Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35c3cfb269935b6…

MALICIOUS

PDF

41.2 KB Created: 2020-08-15 08:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de79e34cbf27e9bf55519cca2b07ed2e SHA-1: 67a48b18a9a5d507c026496d8bba4308cde033df SHA-256: f35c3cfb269935b65bd7b0f38ee247e0195b67510c5e5f58e23ce51da57c7e6b
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wb?keyword=how%20to%20delete%20page%20in%20pdf%20adobe%20reader%209'. This URL is presented within the document body, disguised as a search query related to PDF manipulation. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to 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.ru/wb?keyword=how%20to%20delete%20page%20in%20pdf%20adobe%20reader%209 In PDF document text
    • http://files.poppyavenueboutique.com/uploads/1/3/2/7/132740414/acd23c8057d.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/1/0435/9438/3522/files/barmer_patrika_today_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/rhetorical_analysis_essay_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/82677884273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5455/4533/files/33432223852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/petewon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/pasar_de_a_word_gratis_y_rapido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/pelunesezobojiburomudakak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/19520798276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/12326345861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/watch_47_ronan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/kufazavalivasonurugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/math_algebra_worksheets.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_off00005f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F67 5380 bytes
SHA-256: d1adbb7774bac5f961b35fc499b2a1fc900455a1995c2c67df521b1e988ed5f0
font_01_sfnt_off000071cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CF 11840 bytes
SHA-256: 70e9d06ace723eb04493324e617a7ebcdad33cbe3b8e95f4f7654af728cbed67

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