Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c38dbc30b01501b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-05 05:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1e25bd0477178f7be667f077d546c637 SHA-1: d45bd4c2bcd4b5d63a210626316ab2b5e3249c69 SHA-256: 7c38dbc30b01501b2e2c797dbbd8d20935da1422c2918071d60ebee168a94a54
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirector infrastructure like 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm designed to lure users with the promise of a PDF download. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is part of a phishing or scam campaign.

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=cultivo+de+bacterias+en+agar+pdf In PDF document text
    • http://files.forestfreshproducts.com/uploads/1/3/1/4/131453256/7664b0c984.pdfIn PDF document text
    • http://files.marcosallis.com/uploads/1/3/2/6/132681713/6496127.pdfIn PDF document text
    • http://fimuvaz.philologia178.org/uploads/1/3/0/8/130814328/63560c5365fa.pdfIn PDF document text
    • http://files.jordonministries.com/uploads/1/3/2/8/132814241/6975602.pdfIn PDF document text
    • http://files.problemsolvingacademy.org/uploads/1/3/1/6/131607075/tapekubaf.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/1/0428/3950/7100/files/zajirasifutogobab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/jolited.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/revakal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/96332044317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/44601908728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2190/1729/files/9557574251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/ti_89_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/chrome_remote_desktop_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/4918782814.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_off000061c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C2 5428 bytes
SHA-256: 26f7d44e4e614f768bbaa4b50ecc7dd6cd24c68e67ae84d48ec1accc865f49ef
font_01_sfnt_off00007444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 10516 bytes
SHA-256: 1b51e79aa5df41d263d58870b566277fbd60b6621ff245ec79c3bf3bc39ed1ae

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