Malicious PDF — malware analysis report

Static analysis result for SHA-256 970740aec2287b5a…

MALICIOUS

PDF

35.7 KB Created: 2020-08-12 07:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 321293cc4ed7f070027364f621cf9994 SHA-1: 9d0fe03227556aef9413c76035acf007b911ad45 SHA-256: 970740aec2287b5af4cd03277bc523e0e121bd7de9a812c33ccfb7516abc0e56
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free book downloads, with the primary malicious redirector URL being https://ttraff.ru/pify?keyword=direct+and+alternating+current+machinery+2nd+edition+pdf+free+download. This heuristic firing indicates the document's intent is to redirect users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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=direct+and+alternating+current+machinery+2nd+edition+pdf+free+download In PDF document text
    • http://files.cruzlaminates.com/uploads/1/3/1/4/131453062/6455430.pdfIn PDF document text
    • http://files.rentedfashion.com/uploads/1/3/0/7/130776015/7992082.pdfIn PDF document text
    • http://files.acestudio.be/uploads/1/3/1/3/131383964/gipasixojejat.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/1/0433/7880/2846/files/mulakap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7992/0803/files/cancionero_camino_neocatecumenal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/24560532362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/advanced_calculus_for_applications_hildebrand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/the_famished_road_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/lasobulesugatupobobokev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/najevedubizororefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/buvuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/9078/2881/files/aadhar_card_download_online_by_aadhaar_number.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_off00004dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDE 5716 bytes
SHA-256: d910961aca1e6cf833358563feae1b4156eff1b3dcf5725918afabed1299ead2
font_01_sfnt_off00006143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6143 9520 bytes
SHA-256: 4ac59708e126821efb7f7f5e26f748a1fa1a784f244a08a26a6c853c1feecdb1

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