Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c72a69800204072…

MALICIOUS

PDF

36.9 KB Created: 2020-08-19 01:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e75eecfe0cc34eca5c86337073a84c60 SHA-1: 50e63c65d27b342d46195700f48c75afb3f1ae74 SHA-256: 0c72a6980020407220ca1421788702b5bfbca4848b7d42728110d43bbf271a45
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body and embedded links suggest a lure for free educational material, likely a phishing or malware distribution scheme. The ML classifier strongly indicates maliciousness, and the presence of redirector links supports the attack pattern.

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=berlitz+english+level+1-+4+pdf In PDF document text
    • http://files.agateinspections.com/uploads/1/3/2/6/132682899/6fb4097.pdfIn PDF document text
    • http://files.patsysbarandgrill.com/uploads/1/3/0/8/130813526/sidesotake.pdfIn PDF document text
    • http://files.matej-cerne.com/uploads/1/3/1/4/131483138/80515.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/1/0433/9122/1911/files/division_test_worksheet_grade_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/vofijedozew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/scott_gilbert_developmental_biology_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/velokipuxowufebepupada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/bose_wave_music_system_remote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/59474789174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29331550606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/impact_of_activity_based_learning_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8638/0197/files/windows_10_decrapifier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7104/0675/files/zakoravatuj.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 8

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_off00004fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB0 5424 bytes
SHA-256: beb15a7376b7ea88acfd461132b82f4c2919ef3ed381a638fd260febee51a7e8
font_01_sfnt_off00006246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6246 10628 bytes
SHA-256: 3e2e1005cfed4cc2da2110c94c43e07d6404772024b26ae2e6b8ea154f3a541d

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