Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf6761ee04c73b7…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 15:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99276590b6dca3aba1c171d55f8efbe8 SHA-1: 8d8a7d1e0a48c202e29309a3d35bbefbc9a72a79 SHA-256: 1bf6761ee04c73b7523a75252f6e9af7036cb2c04e487a98339b1e4a4b49292c
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=verbe+go+en+anglais+forme+n%25C3%25A9gative In PDF document text
    • http://files.xonoil.com/uploads/1/3/1/4/131438018/878331.pdfIn PDF document text
    • http://files.cadellcabins.com/uploads/1/3/2/3/132302759/85463d.pdfIn PDF document text
    • http://vakewi.baltodanofilms.com/uploads/1/3/0/7/130776418/2f21bdb4c.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/1/0436/3635/9326/files/wovetodosajaxowemusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7443/7791/files/59668305611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/xawidirejoxapiraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/82825495306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/69794487007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/ge_common_documentation_library.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/xituxoritonenuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/acceptable_quality_level.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5833/8715/files/zisatixenirago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/vumikatibelasuxefur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kekiwimuzavenomudajelibo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B7 5396 bytes
SHA-256: 88ee1f1d3ddf0b5a85a1ed7f936df1dcae8dadd455e0377ada3ca1afa72f3565
font_01_sfnt_off00006bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC0 11936 bytes
SHA-256: c6d6cdd9e0637f69ca42c189cd99bf0bfa40e73fd46de5fc5978b7cbb5d2d528
font_02_sfnt_off0000921c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x921C 16084 bytes
SHA-256: e5245523bd71a78e06ca3300da63f55ad096e28dd8c1a5e83e138be64f7d0aee

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