Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a817cddb58562d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-05 10:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66c03188a2d74fa1d75c33f54823389d SHA-1: 7e97d954e92ef59a8cdc293c4f8bb745aec52a57 SHA-256: a5a817cddb58562d1ef69d205c308f72beb6f10d826714308674d75564b16bff
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'industrial ergonomics book pdf' and a URL that appears to be part of a link farm designed to attract traffic. The primary malicious URL identified is https://ttraff.cc/pify?keyword=industrial+ergonomics+book+pdf, which is likely used to redirect users to a phishing or malware distribution site.

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=industrial+ergonomics+book+pdf In PDF document text
    • http://files.dyivet.com/uploads/1/3/1/8/131871416/7699e6f906c.pdfIn PDF document text
    • http://files.misfitpictureshows.com/uploads/1/3/1/1/131164054/349231.pdfIn PDF document text
    • http://files.ageecabinetdoorsandrefacing.com/uploads/1/3/1/0/131069893/xolunuliw_debedugo_xemesopivepife.pdfIn PDF document text
    • http://ridat.shahinrabbani.ca/uploads/1/3/0/8/130814328/2e14e5aeb6c58f.pdfIn PDF document text
    • http://files.asproengineering.com/uploads/1/3/2/6/132695832/077f708a6dd.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/1/0428/3462/4679/files/fonilewukojube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5749/4686/files/hungry_like_the_wolf_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/96484634482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/15151563705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/brandenburg_concerto_5_sheet_music_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/wibazipagerinabowezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8453/files/tefonefimevojovuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1766/4674/files/rulovikuwobatopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/7539969151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/acca_manual_n.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/vejigimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/89141775972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/86756487319.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 8

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_off0000664a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 5616 bytes
SHA-256: c915b3a3cafedda6285a3b7e7e08e6f776840460b5227a7a13c73a150e9a8d34
font_01_sfnt_off0000794f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794F 10376 bytes
SHA-256: 453702c8a569b9f3e93a192476669819f933b091f53d2f3ec710ff06eae5655f

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