Malicious PDF — malware analysis report

Static analysis result for SHA-256 122f370c1c2520f0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-26 12:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20b8aa76c5c5c3b25655f734527aa66b SHA-1: 37266d25804a675bd48a40448b2291dda6479966 SHA-256: 122f370c1c2520f0d315f5c61e18336265ec01d800af57c64ca48afbeb7de440
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that masquerade as a resolved Excel questionnaire, aiming to trick users into clicking a malicious redirector URL. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cuestionario+de+excel+resuelto, which is flagged as a known malicious redirector. The document also contains a large number of external PDF links, many of which point to benign Shopify-hosted files, suggesting a link farm or SEO manipulation tactic to obscure the malicious intent.

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=cuestionario+de+excel+resuelto In PDF document text
    • http://files.terralindapediatrics.com/uploads/1/3/1/4/131437457/1805852.pdfIn PDF document text
    • http://files.trailtothepeople.com/uploads/1/3/0/7/130739043/bavupurope-kosagafavujirub-lagaximutal.pdfIn PDF document text
    • http://files.simons-petsitting.com/uploads/1/3/1/4/131437385/wowelopisuxet.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/1/0431/5129/4619/files/67213850676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1976/2855/files/arab_horror_movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/chucky_full_movie_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9935/6324/files/astm_plastic_pipe_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/better_than_carrots_and_sticks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6876/5861/files/free_name_badge_design_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/femuzibuworikidomunebefal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/38325407182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/factoring_quadratic_equations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/addition_to_10000_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/72583245540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/jederakagoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4600/1045/files/schools_of_psychology_behaviorism.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 4

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_off000066a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 4908 bytes
SHA-256: 64072814b0e2327062db5440b6488d87eea5c4b3c3b0619a76489db75f0259f1
font_01_sfnt_off0000775e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 11732 bytes
SHA-256: 3abd45ac8deef5a4ab90afb0713c91473b4ea206fd2eb9e73bacfd6f7ef5cec7

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