Malicious PDF — malware analysis report

Static analysis result for SHA-256 4132c8c45228679c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-09 09:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf27071fd3b8db20344c706b2944ee07 SHA-1: 70650b0b884843c8fcb7cb67ee7dff679484b4aa SHA-256: 4132c8c45228679c08419faac58afe7ab412ae3ec1ca9959a8334b0c89293db1
210 Risk Score

Malware Insights

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

The PDF contains a lure related to converting files, with embedded links. One critical heuristic indicates a PDF redirector link to traff.com, which is known malicious infrastructure. The document also contains a mass of external PDF links, many hosted on Shopify, likely for SEO poisoning to increase visibility of the malicious lure. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=convert+pdf+to+autocad+online+free In PDF document text
    • http://files.stephenvillavaso.com/uploads/1/3/1/3/131378899/2137277.pdfIn PDF document text
    • http://files.east-pto.com/uploads/1/3/2/8/132814611/vedabuvopobej-fakuwud-vomaba.pdfIn PDF document text
    • http://vitugol.jamfinearts.com/uploads/1/3/1/0/131071164/filetinawizaweborav.pdfIn PDF document text
    • http://files.ausmazehanatkhan.com/uploads/1/3/1/4/131483719/nakokudifaxovukejet.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/1/0433/0687/7080/files/72438278193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/muridulagonuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/mewelama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/69291140648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/52487565106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/32452026855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9733/3664/files/17937081999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/79918723772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0939/9192/files/mutemath_spotlight_twilight_mix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/dresden_files_rpg_our_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/79244065007.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 4936 bytes
SHA-256: 9188cfd2f63a48c09c5b118afa19bc72f579797504881c6ab53d90e2e6d8be35
font_01_sfnt_off00006f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37 10128 bytes
SHA-256: ad7060acb6eebc52c70a7ae6852979a4a9e89af44f95dac6e0e0adb17a92aedf