Malicious PDF — malware analysis report

Static analysis result for SHA-256 84840e262e4d908b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-25 05:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 341380cb2dd4aa73b58c1bf098bc6743 SHA-1: 741002a9e9431bd061dde30605e3830f9cfc80ef SHA-256: 84840e262e4d908b2a61a6262ceb9b9fe3f8df749e9d9d983264ac9cade8c871
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a redirector service (ttraff.ru) and others to what appears to be a link farm of PDF files hosted on Shopify. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics, suggesting a lure for free downloads or guides. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points towards a phishing or malware distribution attempt.

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.ru/pify?keyword=animal+crossing+hair+guide+colors In PDF document text
    • http://zusemanag.brurosa.com/uploads/1/3/1/4/131438304/lefetudi.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/1/0431/3183/0421/files/after_effects_tutorials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/31233090225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/21101227344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/case_in_point_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6905/5911/files/14940938751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6767/8618/files/round_2_decimal_places_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6623/6834/files/44019796134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/anbang_insurance_group_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9624/3364/files/hoover_power_scrub_deluxe_carpet_washer_manual.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 5

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_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 5340 bytes
SHA-256: 1f1c77e2705050bd7a6ad7495dd25bfe73598c4069f5c4d1d1860a13c0cd5b96
font_01_sfnt_off00007303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 10352 bytes
SHA-256: f3570165e04f41941b301647f8155cf3b43c662d46843799354a31ad2c155be6

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