Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb77a35e98f40a4…

MALICIOUS

PDF

60.4 KB Created: 2020-08-06 13:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca5301f6dc432a19256e5d69478fe3d3 SHA-1: 8c1904745626db9ff1af71497a35e87f108cb2ee SHA-256: bbb77a35e98f40a4cc82fa48a9147f6313e1fdc1c38da775dbf2b6ed8b4192b1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating redirection to known malicious infrastructure via 'ttraff.com'. Another heuristic identified a large number of external PDF links, many hosted on 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, reinforcing 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.com/pify?keyword=miocardiopatia+dilatada+ni%25C3%25B1os+pdf In PDF document text
    • http://files.kristinreeg.com/uploads/1/3/1/3/131383434/8677821.pdfIn PDF document text
    • http://files.sunglasspanache.com/uploads/1/3/0/7/130775045/fd1debb750b5a25.pdfIn PDF document text
    • http://files.cedardifference.com/uploads/1/3/1/4/131453247/kawelodorivuj-xepin.pdfIn PDF document text
    • http://files.nouveaumedic.org/uploads/1/3/0/7/130775357/7671489.pdfIn PDF document text
    • http://files.downtownldnliving.ca/uploads/1/3/1/4/131438847/pareduvevupe.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/1/0433/4741/1096/files/typing_club_auto_type_tamper_monkey_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9409/8598/files/89101577774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/reality_therapy_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/powazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8748/7395/files/metamezagonirig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/widijinavetoxonadefav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/54998046158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3439/4276/files/70705921783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/gepaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/30827520605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/aprendizaje_significativo_redalyc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/child_support_agreement_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/vazimaxidukugizo.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_off0000aae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAE5 5364 bytes
SHA-256: de6eb4eed308a43cf5f41e374d1914f2b5af246cf15aab05b57cc9516965014e
font_01_sfnt_off0000bcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFE 11484 bytes
SHA-256: 8b4eb04d45f72669918d66ccaf70e3ae2bfb8044f097ba446141f2baba0a38cf

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