Malicious PDF — malware analysis report

Static analysis result for SHA-256 1939c6fa092f75cf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-09 14:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6d51e8f0976b7de34a65072f6a5b1b4 SHA-1: a70426020665bf3b67ec878d314525bd5be0d22c SHA-256: 1939c6fa092f75cf986d7983ee754e55a8b262441f1539dcb5b8610deaf0697e
194 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector service designed to obscure the final destination. The document body, though partially corrupted, contains text suggesting it is disguised as academic papers, a common lure for phishing or malware distribution. The presence of a malicious redirector and the ML classifier's high confidence score indicate a strong likelihood of 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=appsc+group+1+previous+papers+pdf In PDF document text
    • http://files.180degreefinancialcoaching.com/uploads/1/3/0/9/130969744/d6ced7.pdfIn PDF document text
    • http://files.walkingmeditation.eu/uploads/1/3/0/7/130739616/dewitadudibokes_jomameroxizeko.pdfIn PDF document text
    • http://files.englewood-umc.com/uploads/1/3/0/7/130775334/6453165.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/1/0433/3476/2664/files/443856616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/adjective_or_adverb_exercises_elementary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/pinoxifurijar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/540_2ez_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/fasapafadijipivibogete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8113/6296/files/dynamic_business_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5300/7516/files/nezigaregixezopox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/jupabupetefizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/2069102887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/how_to_change_discord_font.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/jimmey_sweeney_cover_letters.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_off000061c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 5392 bytes
SHA-256: 6b28db3f3eb1b2e399319215f2798edeeebea207b5875229e6d07d03f32cd1a1
font_01_sfnt_off00007442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 14428 bytes
SHA-256: 6aab5b67cb0cd67bff68a09abe6f6f7ddd1de62d2bd9d9942ebd0eb4f127bb28

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