Malicious PDF — malware analysis report

Static analysis result for SHA-256 893877a38e2e49e6…

MALICIOUS

PDF

35.5 KB Created: 2020-07-26 18:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28c845a475d4da01212eeb4fba568162 SHA-1: 3a12afc09ef47140b9316ec7e73eaac255f877f3 SHA-256: 893877a38e2e49e666837adff71942e119d67f3931d2ceb72ba6e258f946bec4
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector and part of an SEO link farm. It links to a redirector URL that is known to be malicious. The document body, though heavily obfuscated, contains text related to 'sweet baby photos' and the wkhtmltopdf application, suggesting a lure for free content. The embedded URLs are designed to lead users to malicious infrastructure.

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.ru/pify?keyword=sweet+baby+photos+hd+free In PDF document text
    • http://files.richlandsrbetaclub.org/uploads/1/3/1/4/131406434/waludewonalo.pdfIn PDF document text
    • http://files.judithviskerart.com/uploads/1/3/0/7/130739021/b1c60ebf8a7319e.pdfIn PDF document text
    • http://files.heavytruckphotos.com/uploads/1/3/0/7/130739353/9eaa3.pdfIn PDF document text
    • http://files.mojosexual.com/uploads/1/3/2/6/132680932/7270646.pdfIn PDF document text
    • http://files.amandamelissa.co/uploads/1/3/0/8/130814235/nopikinoko.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/1/0428/9835/8432/files/kofuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/nekedukigumeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/pujojivap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/bidugazovorudinirijiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/22362867815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/79498631835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/finigekezezubokeseronix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/mafewawedurupewizoduw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/vuvafazabalasoxivadofi.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_off000052d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D2 5168 bytes
SHA-256: c9964993c34f35c7bfa5cb04ebe843ae3b872732f9090589aeb7d4c1dd716741
font_01_sfnt_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 8448 bytes
SHA-256: 379bc0b9ef27170aec50a28c2ea4277ad8d109eb9b82df0704f981b07516af55

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