Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65e90d06d6727ab…

MALICIOUS

PDF

42.0 KB Created: 2020-08-06 09:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a22e71d54ba7cd37b262f317081b0dd4 SHA-1: 83bcd700d99a95d2daa906f8a741010e1a2987fa SHA-256: f65e90d06d6727abb57354fd726406cdc54d3b01639bfcb651a41ee108037e69
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO poisoning or link farming. One of the primary links, https://ttraff.cc/pify?keyword=anorexia+nerviosa+psiquiatria+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'anorexia nerviosa psiquiatria pdf' and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier also 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=anorexia+nerviosa+psiquiatria+pdf In PDF document text
    • http://files.tiffanysews.com/uploads/1/3/1/3/131398164/379009.pdfIn PDF document text
    • http://files.junamustad.com/uploads/1/3/2/6/132681351/70392.pdfIn PDF document text
    • http://files.atxfashionbydesign.com/uploads/1/3/0/7/130739093/boletivivefu-nejig.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/1/0433/6808/7701/files/app_secrets_sean_casto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/gizenujuzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/45329609794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/95807327090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5037/5070/files/juridifedutoxogomolipamaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/social_psychology_4th_edition_test_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/68210927480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/gerodivipola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/60621518147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/sufijamisadufitibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7432/9507/files/puworaviseroruveruwemam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bewewolifokolugetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/warobigogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/thomas_calculus_12th_edition_free_download.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_off00006624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 5244 bytes
SHA-256: 4d2d6432f97b05f4202e2868c89086b4809b96d1b7f80775ff4c78bb7d46ae18
font_01_sfnt_off00007812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7812 10300 bytes
SHA-256: f86c73d2e08c2609882c25828e3bf817fbdcdbb5e92266d6415753ce5ae4b931

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