Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac653a83d5756ace…

MALICIOUS

PDF

60.7 KB Created: 2020-08-18 23:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21b102997785cacad3c4dfc1f24b552e SHA-1: 54b5ff447f34afa25c6d2d8d381c3b944db05a4d SHA-256: ac653a83d5756acee31d3c20ca6febf486277fef44f4d8026c05c64927fb9af2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to external resources, including a benign-looking Shopify URL that is likely used as a lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=drywall+sheetrock+gypsum+board In PDF document text
    • http://files.hangingbetween.com/uploads/1/3/1/6/131606198/tususakidiwi.pdfIn PDF document text
    • http://files.lisagoethemcginn.com/uploads/1/3/1/8/131871419/a147e7d1c7f750.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/1/0434/5842/9078/files/legends_of_runeterra_open_beta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/maths_olympiad_books_for_class_5_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/28522533481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/arabic_dictionary_offline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/lupanin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/cambridge_english_for_engineering_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/95625254583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9226/2560/files/59702923567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/autocad_2020_import_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8296/3361/files/87320426083.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 3

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_off0000adf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF5 5884 bytes
SHA-256: 2b2e7a3a85cc7bd7d2c946d19f470dcffe1c6a8c52b95d31a74051c8f1a0d90d
font_01_sfnt_off0000c1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F1 10584 bytes
SHA-256: 104f39d0016d65637e8dab57420d4b9f6633340954988cb67d20e54aa10fee27

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