Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff38d82fc588f96b…

MALICIOUS

PDF

33.0 KB Created: 2020-08-20 08:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 775494cd5f03842bd9da402bdc7571a3 SHA-1: e674e06a7aff2d678f507bab6467f7a1783da9a1 SHA-256: ff38d82fc588f96b63f30ae91e6f2fc7ea416c929ae262ae2ee217a542f1db08
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a worksheet title. The document also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains. The primary malicious link is https://ttraff.cc/pify?keyword=perpendicular+bisector+problems+worksheet, which likely serves as a lure to a secondary malicious resource.

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=perpendicular+bisector+problems+worksheet In PDF document text
    • http://juxafi.middleburyactors.com/uploads/1/3/2/7/132710621/8759360.pdfIn PDF document text
    • http://files.cellar27furnitureco.com/uploads/1/3/0/7/130776033/2490977.pdfIn PDF document text
    • http://geritilo.small2big.co.uk/uploads/1/3/1/3/131383791/7b235e3.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/1/0427/9150/1990/files/maxonolugunepurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/bloodlines_richelle_mead_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/workforcenow._adp_first_time_user.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/70107107366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1577/2059/files/90699065925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/analgesia_anaesthesia_and_pregnancy_a_practical_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/mekakumupeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1615/8359/files/beclomethasone_davis_drug_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/sepegirigegutelapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/business_law_notes_kenya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/78572803483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3941/6732/files/famadaburijod.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 6

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_off000044c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C2 5612 bytes
SHA-256: cd4b88b83c619f284d63cae827022310cb6cb2b8814aef77379b17b8888f88f3
font_01_sfnt_off000057a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A1 9220 bytes
SHA-256: 038f0625c0536933ef8afb3ad2e1fea67cd532e5c8fb24ea7b5ca854823e800d

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