Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c432fb108512a0d…

MALICIOUS

PDF

50.3 KB Created: 2020-08-24 18:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 706f0c05fb8c23092119fade8194c3e8 SHA-1: 183827f7fef521f5382f3fc81265786acbd18895 SHA-256: 7c432fb108512a0d936f68267b2d330bc44244f2de298b67951cb0b4901b9c23
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, disguised with keywords like 'Bihar board 12th admit card'. This indicates a phishing or SEO spam campaign aiming to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict.

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=bihar+board+12th+admit+card In PDF document text
    • http://files.borrowedheartsfoundation.org/uploads/1/3/0/7/130739974/miron-wuzipemarapu-najoxazararos.pdfIn PDF document text
    • http://nojur.royackerskennels.com/uploads/1/3/1/3/131380828/8312371.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/desixagifis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6427/8686/files/11432130401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7810/7811/files/tovuxolajefiwexekowevuvoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0774/5958/files/massachusetts_rmv_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3208/2594/files/74711480314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5205/6227/files/logo_quiz_free_ultimate_guess_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/wiwirugaxumajizepipiwix.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_off000068f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 5340 bytes
SHA-256: 831cfca837a4e937fcc8939f86f09558ec331ef4b4cbde9a447fdf678621a058
font_01_sfnt_off00007afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 12664 bytes
SHA-256: fefa0d822720278e2e2b6416da97d4ebf0db42aa99e8f7a656dbced7c66cd751
font_02_sfnt_off0000a3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E3 7428 bytes
SHA-256: 2730a5e62ed11968948a7de30a5fbb4ab89a0aefa33bf2605b6f47ae7349a415

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