Malicious PDF — malware analysis report

Static analysis result for SHA-256 841dc8360f7c4af8…

MALICIOUS

PDF

46.2 KB Created: 2020-08-11 16:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb6d3758ce6eb3e95517897650f800b0 SHA-1: 1a0e55cea575d274b0541591ccc7385ec7b1d6b9 SHA-256: 841dc8360f7c4af85794e8908cc2e85061073e1e4997984d8ba065285f00c10a
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains URLs that are part of a link farm designed to drive traffic to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=bergmann+s+rule+pdf In PDF document text
    • http://vasitofod.milanamclead.com/uploads/1/3/0/8/130874633/neredibejelele-zusuwozekezeza-mutiferinuz.pdfIn PDF document text
    • http://dololok.southcoastsporthorses.com/uploads/1/3/1/3/131379732/18c9230af6.pdfIn PDF document text
    • http://files.kasaunhenry.com/uploads/1/3/2/6/132681665/522692.pdfIn PDF document text
    • http://files.waterboromarket.com/uploads/1/3/1/0/131070993/d21f27.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/1/0429/7143/1065/files/49831848530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/69349918655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/gabobozibidem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1488/8360/files/canal_boat_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6180/4198/files/71929087587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/abbyy_transformer_full_version_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/86169372786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/6003/7541/files/alcohol_y_diabetes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6910/4540/files/wafox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/pitaruravupobumipozumig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4893/4295/files/6760709204.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000766c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766C 5408 bytes
SHA-256: 5c6ead7cdc8a7cda69ca6f3a8e3c68166e0d998b569cfc082a0e516f1b8cd9d1
font_01_sfnt_off000088ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BA 10232 bytes
SHA-256: 4566bba4cb7735c6616939a5fadbdc2e647c2e8d292a5612cf6f9efdad0bc47a

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