Malicious PDF — malware analysis report

Static analysis result for SHA-256 71abc3889faa13cf…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 03:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba67fd6e8a195233beb550f9a30c74ee SHA-1: e1d8dda728c0131f9f7e9ee9dea3c4c816ea1598 SHA-256: 71abc3889faa13cf91cb28e79368ceede9c21f7b7d90033a59de5e5223be4726
194 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector infrastructure, identified as malicious. The document body and heuristics suggest a lure to download a PDF, likely a phishing or scam attempt. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a link farm or SEO abuse for distribution.

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=literature+review+on+social+media+marketing+pdf In PDF document text
    • http://dewebe.americaninspections.us/uploads/1/3/2/7/132712315/3158534.pdfIn PDF document text
    • http://tijiraxo.positivelyobedientcanines.com/uploads/1/3/0/8/130814328/tazidewadinaxu_nesojiruvab_tibomux_nopopilopak.pdfIn PDF document text
    • http://files.ripples.us/uploads/1/3/2/7/132740277/bufunuvadisozamer.pdfIn PDF document text
    • http://files.brissaeden.com/uploads/1/3/0/7/130775772/fazobiberupopobisoxo.pdfIn PDF document text
    • http://files.authorrobertmuir.com/uploads/1/3/1/4/131407435/kozufetexoxoto-zenupeterim-retasedatodam.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/1/0435/4985/1811/files/9312899220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/12276737281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/epilepsy_and_the_functional_anatomy_of_the_human_brain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/61729375410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/36375722416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/marine_steam_boilers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/fascia_de_camper_y_scarpa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/60405954443.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 7

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_off00006548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 5632 bytes
SHA-256: 2f881cbab968761d58fa393fc8a0cb1ff211f44653ee1024c53799c4b8e24cc0
font_01_sfnt_off00007873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7873 10560 bytes
SHA-256: b9b0cc18aa903ba744c0d060916bb5f5127b88e49ffe5a6301c8e6794afd2157

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