Malicious PDF — malware analysis report

Static analysis result for SHA-256 72407ca6e90d740d…

MALICIOUS

PDF

46.0 KB Created: 2020-08-11 04:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9aa0e06be81c914251419c797ac6c8e4 SHA-1: 59a67babb9cc86b3bda0c89a49071643ccc8c96f SHA-256: 72407ca6e90d740d5f109db3fb2188cd056276f16837c1f7a07754264853cd2c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body itself includes text related to 'Atal bihari vajpayee books pdf free download', suggesting a lure for users seeking free content. The presence of a malicious redirector link and the SEO-optimized link farm structure strongly indicate a phishing or malware distribution attempt.

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.com/pify?keyword=atal+bihari+vajpayee+books+pdf+free+download In PDF document text
    • http://files.ibrowsebooks.com/uploads/1/3/1/8/131857565/2934539.pdfIn PDF document text
    • http://files.theaustintexasteaparty.com/uploads/1/3/1/1/131164431/kilak.pdfIn PDF document text
    • http://files.jeremybraden.com/uploads/1/3/2/3/132302859/sovak-jitixowebirew.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/1/0435/0682/7428/files/64_as_a_fraction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3282/9342/files/dujewatusekugadojadef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/matekemaxebatifesixulus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/66594547246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/85406056851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/87535648080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6211/7020/files/the_banking_act_of_ghana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/at_t_premier_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/vakobajuwebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1995/2540/files/lukodetonadunojiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/7380834289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6559/7342/files/biblia_del_nuevo_testamento.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_off000074ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AD 5652 bytes
SHA-256: 99ca292ba8ea09992cd2a180bedb0d8a77c3422f24d92ad1ed2518746e19fa63
font_01_sfnt_off000087f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F2 10272 bytes
SHA-256: 3932f77f97ab738cd05edeeb5b6ff31ea017229d13d60545bca144da171fe1ec

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