Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fe3aa3e2b24f51…

MALICIOUS

PDF

46.1 KB Created: 2020-08-23 09:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 270e4c297dbf74bbc4332f8ebf31be69 SHA-1: 6a1b71e708fac78ba05d2b856d19a52030b936ac SHA-256: 70fe3aa3e2b24f511528ae750760a74b6893624de3a91f543a192e11153eb50e
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a primary link pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=b.+sc+maths+paper+pdf`. This redirector is likely used to obscure the final destination, which could be a phishing page or a malware download. The heuristic firings indicate this PDF is designed as a link farm to known malicious infrastructure, masquerading as academic material.

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=b.+sc+maths+paper+pdf In PDF document text
    • http://xakow.washingtoncountylivestock.org/uploads/1/3/0/8/130873738/sazetudagum_fesupilosol_resotobekiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/30897138850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/85525673140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/braverats_regles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6231/9521/files/cnn_neural_network.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/gapakabosivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/71784076502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/xilaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5625/8454/files/jee_main_chemistry_formula_sheet_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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B20 4968 bytes
SHA-256: 2eb491084f8b8a5ec8a806726efabfbfb6d4e4d5aa7fdc345abd2b8a1242aa83
font_01_sfnt_off00007bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFD 9896 bytes
SHA-256: 4f991e1536866174e432df1085238758391f76c9f8848a74a45b003e4ba71a33
font_02_sfnt_off00009de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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