Malicious PDF — malware analysis report

Static analysis result for SHA-256 101333b41fbec877…

MALICIOUS

PDF

56.7 KB Created: 2020-08-24 20:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 922d474c36c8b2f2ba9e6eee77b3ec64 SHA-1: 5a45978279db630fda4013f5b85c344b0b6559aa SHA-256: 101333b41fbec877f822801086f1cf123cfd74374fdc21d63de690712b982a42
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, designed to obscure the ultimate destination. The embedded URLs point to a redirector service that is known to host malicious content, likely to trick users into downloading malware disguised as an Android application converter. No scripts were extracted, but the structure and links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.ru/pify?keyword=audio%252F+video+converter+android+mod+apk In PDF document text
    • http://files.chewinggumchains.com/uploads/1/3/1/4/131437889/zodawimaviwax.pdfIn PDF document text
    • http://files.artofashesamuels.com/uploads/1/3/1/8/131856358/9883214.pdfIn PDF document text
    • http://files.pandasofwar.com/uploads/1/3/1/4/131484328/dofigasuleg-wuvoki.pdfIn PDF document text
    • http://fosufeti.ballaratbiblestudygroup.org/uploads/1/3/0/7/130776757/viforixiwiwonupoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/25973806308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/68704245904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0183/8757/files/16651484741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/xogilaritanet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0147/0366/files/review_of_related_literature_about_absenteeism_in_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/adyashanti_true_meditation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/tazonivagutosufelevivakek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/63666972811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4098/8575/files/myocardial_infarction_complications.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a565.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA565 27560 bytes
SHA-256: 209f62c0b82c2d225891f316a9f2e2dded0b622ae98755ab1587a0e1217fc79f
font_00_sfnt_off00006df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF3 5156 bytes
SHA-256: ab6bca7a88527199b47625899e7df9030dcf83c7e1a9f2b8f76ab41d78dbfe93
font_01_sfnt_off00007f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F70 11608 bytes
SHA-256: f28c5855a59058308dbb19f52eafbd5b604d98e526c084c725a8fbbbe39fe641