Malicious PDF — malware analysis report

Static analysis result for SHA-256 1895dddd2267cbcc…

MALICIOUS

PDF

47.2 KB Created: 2020-08-07 13:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 96447851ddd92283eed2a35e536a821a SHA-1: fd8ea15b149a1512ef9228253b5113a8db1a9e18 SHA-256: 1895dddd2267cbcc8473d82eec6b9c8ecf57164d1190c6048124072dc3da9f1a
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, designed to lead users to potentially harmful websites. The embedded URL and the document body text, although partially corrupted, suggest a lure related to 'maths formulas', which is then used in a redirector URL. The ML classifier strongly flagged this PDF as malicious.

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=maths+formulas+upto+class+12+pdf In PDF document text
    • http://files.roofingfayetteville.org/uploads/1/3/1/1/131163613/fca1689.pdfIn PDF document text
    • http://files.kuwaithomeschoolleague.org/uploads/1/3/1/3/131380158/jedoroxulor-suxagemupid.pdfIn PDF document text
    • http://files.hattology.com/uploads/1/3/1/4/131409677/7961756.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/1/0435/0600/8216/files/74114666010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2388/2645/files/wizalaxuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/jowirurejudopifelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7699/3695/files/18015509425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/sprinter_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/90730468770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/sisulifapupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7645/9425/files/honda_trail_50.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3024/7584/files/balotario_mtc_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9944/5664/files/python_round_float.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/probability_brain_teasers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/pengertian_atheis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxasukazojolivuf.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 5

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_off00006ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBE 5584 bytes
SHA-256: ae321c6d76c9f27fbc38be8fcab867a56eed8ec275de3bb4117c5bedbf14d412
font_01_sfnt_off000081a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 14692 bytes
SHA-256: e970da32e2d6e4a0a4c541de1058ef0502995291768e5c55d70f7f8806ff06c6

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