Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1a9a2cf9cd28921…

MALICIOUS

PDF

43.3 KB Created: 2020-08-22 10:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 164d01a185047f2179994a48338ce344 SHA-1: e87c7cc6cc4e865fb8f76d698fd7cdab91ff3892 SHA-256: d1a9a2cf9cd28921dfc6593f726d50b2a0dba1d3c677d97f3fc573f2a2e8a1be
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The primary malicious URL, 'https://ttraff.ru/pify?keyword=an+inspector+calls+revision+guide+answers', is likely intended to lure the user into clicking a link disguised as a revision guide answer key, leading to further malicious activity.

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/pify?keyword=an+inspector+calls+revision+guide+answers In PDF document text
    • http://files.stuartlewisphotography.com/uploads/1/3/0/8/130873708/rupazutitovot_giforaseze.pdfIn PDF document text
    • http://files.vlassolutions.com/uploads/1/3/1/3/131381658/ropobo_duzekerem.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/1/0432/7525/5961/files/70434622881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2552/5910/files/bittorrent_free_for_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/bamaxila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/36999281696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/49103223905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/18426351723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/our_god_is_an_awesome_god_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/60051084624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/san_michele_arcangelo_storia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/elementor_my_templates_not_showing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30611133668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/snapper_lawn_mower_manual.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 2

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_off00006bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF4 5384 bytes
SHA-256: 6cd0fd56611c4abf73d1d679ae3c9436b5b8deaa501d29d726eb033bcd594cc5
font_01_sfnt_off00007e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E57 10036 bytes
SHA-256: 21a88af74c9316f958ea3dd35ffbe3e3f0a0baee6c03ea83e895c492b68e9cc0

Open this report in the interactive analyzer, or submit your own file for analysis.