Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b7791ff1c0890d…

MALICIOUS

PDF

60.2 KB Created: 2020-08-07 13:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86ecf3ab41d982f3dbb2e0728016048e SHA-1: a71200e0e3be552adbeb224b16d063200dbc1a09 SHA-256: 86b7791ff1c0890d2e3c5b1715c12b51b78466c1864ddd3e241406eb90834573
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of an SEO link farm designed to distribute other PDFs. One primary redirector URL, https://ttraff.com/pify?keyword=toefl+itp+reading+comprehension+practice+test+pdf, is flagged as malicious. This suggests the document is part of a phishing or scam campaign aiming to trick users into downloading further malicious content.

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=toefl+itp+reading+comprehension+practice+test+pdf In PDF document text
    • http://files.dongpu.studio/uploads/1/3/0/8/130873708/xitabelusimi.pdfIn PDF document text
    • http://files.jesusgoes2italy.com/uploads/1/3/1/8/131871730/392450.pdfIn PDF document text
    • http://files.gamingcomputersstoreunit.com/uploads/1/3/1/1/131163980/e9388b1dfc7e1e.pdfIn PDF document text
    • http://tofazosin.taylorcdotson.com/uploads/1/3/2/7/132710712/xujatetu.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/1/0430/1763/3949/files/94261500036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2057/3080/files/briggs_and_stratton_engine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/75718068832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/78937551522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/pain_train_tf2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/91166309940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/13655191524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/zetulisirazituman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/dajutatif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0775/3888/files/system_analysis_and_design_tutorial_free_download.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_off0000ac94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC94 5516 bytes
SHA-256: 997ee9055abd8f1b83b10a384bd183e9ec856c37e2d29eaaebae520ad6f6d358
font_01_sfnt_off0000bf2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2E 10708 bytes
SHA-256: 0bf440db543467b29f08d8f97668b769eaaa933ebedac73dfdc218f08a05f924

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