Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c52149b9c3abc88…

MALICIOUS

PDF

54.0 KB Created: 2020-08-22 21:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da00074afe29fe073ff4d66b83e625a7 SHA-1: eb3352861d23bc9bac79b314aa8ac337df2a4b1c SHA-256: 8c52149b9c3abc887f729bf6164b1e9bf212095236ff5b06bfc2b3658e15814e
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as a download button, aiming to trick users into clicking it. The document body mentions 'Whatsapp unblock apk uptodown', suggesting a lure for potentially unwanted software. The primary malicious IOC is the redirector URL, which leads to further malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=whatsapp+unblock+apk+uptodown In PDF document text
    • http://jerabapun.escapeedventures.com/uploads/1/3/1/3/131382406/vavezufa-xisufekoxu.pdfIn PDF document text
    • http://jodaxiw.impulsivelust.com/uploads/1/3/0/8/130814187/dereruna-gesemikevuwo-nevoz-vonomarono.pdfIn PDF document text
    • http://wexusus.johnsastrophotos.com/uploads/1/3/1/6/131606490/lirexapodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/vupodu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/annotate_evernote_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7491/8302/files/bootstrap_datepicker_date_format_change.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/bunty_aur_babli_movie_for_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/xogibimavidalapataxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/66560155044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/mipiramu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/r_multivariate_normal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8692/1374/files/wodosepijogatupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/97239065160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/ccna_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D28 5088 bytes
SHA-256: 848a5e2ee6edd74117fe6b5dd6a5a0fbfff926f309661c1374826468849a93d0
font_01_sfnt_off00006e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6E 5232 bytes
SHA-256: 4b7cd8206df5fec7737c8405ac61adcefc1c1f311c7ce56439d829f03cc01281
font_02_sfnt_off000081ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AD 9892 bytes
SHA-256: 32df04c5473e8015fe477026e7ccbeea836d2b3d525b7bd746940c6b60523009
font_03_sfnt_off0000a3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BB 16612 bytes
SHA-256: 910cf433cabb5c342e4c21774d869bd0a88ead02ffe7c7b945718223a37f0506
font_04_sfnt_off0000ba74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA74 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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