Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b66fee3edebab1d…

MALICIOUS

PDF

46.8 KB Created: 2020-08-10 00:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 235b78b7702f6bc1eb3a860a51703e4b SHA-1: af5ecf5da777b759424e53f36222e28d6b22c9fa SHA-256: 9b66fee3edebab1dc40c0b41292c1fae9320a2664a99b69c4ccf3dada1f4178e
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials or MFA codes, likely by redirecting the user to a phishing page via the malicious link. No scripts were extracted from this sample.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=the+nine+abdominal+regions+pdf In PDF document text
    • http://zikapejo.smhs1988reunion.com/uploads/1/3/1/3/131398455/181445.pdfIn PDF document text
    • http://files.yathuhospice.org/uploads/1/3/1/4/131407796/6032474.pdfIn PDF document text
    • http://files.llenise.com/uploads/1/3/0/7/130775309/vogiji.pdfIn PDF document text
    • http://doxoriv.mrmyrtuesclassroom.com/uploads/1/3/1/4/131438079/4937887.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/1/0431/1079/3382/files/bumapukejefibivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/67980501513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/kotisuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8869/0841/files/kerikuxutosomoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3246/0960/files/72997823906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7978/4866/files/83289300565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5943/0047/files/xebolovuxefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/joxerovuwitazixifuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/59068889896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4831/2738/files/between_two_worlds_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/jelakatogejukuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/management_dictionary_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/12930256249.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_off000072ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AD 5544 bytes
SHA-256: a733fc0fd00bdfaf5db2ebbb8da921b1f5cca7fa8db9225335e270c17a4ca02a
font_01_sfnt_off00008550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8550 12976 bytes
SHA-256: 25691c9c10ef94ae1d23ee0f2d9cf29c1d7fb023989f19d73f683633748fe5dd