Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d1b62ea691f074…

MALICIOUS

PDF

49.7 KB Created: 2020-07-30 07:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 696b7edded22a2b72d93426cd03b66b5 SHA-1: c295393877e121a92d1b36131daac97ff42a0741 SHA-256: 81d1b62ea691f074d0563a4b78142c7baf770469f4d522f2413c719b78bc9517
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links designed to redirect users to a link farm, masquerading as a source for free software tutorials. The primary redirector URL is identified as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive traffic to potentially malicious or spam-related content, likely as part of a phishing or SEO manipulation scheme.

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=adobe+after+effects+tutorials+free+download+pdf In PDF document text
    • http://files.brennanthefounder.com/uploads/1/3/0/7/130740174/purunetubumeker.pdfIn PDF document text
    • http://files.ktwines.net/uploads/1/3/1/3/131379382/3066026.pdfIn PDF document text
    • http://files.melindacochraneauthor.com/uploads/1/3/0/8/130874257/xazivuga-letekikuzitulo.pdfIn PDF document text
    • http://files.madanihotelmedan.com/uploads/1/3/1/4/131454090/5448110.pdfIn PDF document text
    • http://files.oo-art.com/uploads/1/3/0/7/130738779/gubifexafodomo.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/1/0427/9818/6652/files/konurapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0398/5570/files/pepesabugegepesin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/67113007375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/wezibonizazarujikarujig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5419/4085/files/duwedumiriwekakidumoreto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9725/0210/files/kiluwasedasezoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/seliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/rimipoxetit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/vuxosavejofewaj.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_off0000842e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842E 5252 bytes
SHA-256: 3c13e8efe00dbc75b991e2e16db368942e30eaed2c57454c3a7e9cfe3f1f4e3f
font_01_sfnt_off00009625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9625 10388 bytes
SHA-256: b46c0d687be2340c5197bef61a4df840d352dce2a0c3fda3c952791ce532cd3d

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