Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb40acb44abd8d39…

MALICIOUS

PDF

44.2 KB Created: 2020-08-18 16:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17e92ccc5f9a3da29a73a7522091cc55 SHA-1: 5ac99d53b0a81e4d8a2b5597e64ac042903ff3fc SHA-256: bb40acb44abd8d3971208c9be2589ff5fe45853d596b447656e98fa81f395e77
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'certificate of conformity' and the malicious URL. The presence of a PDF link farm heuristic suggests an attempt to distribute malicious content or SEO poisoning. 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.ru/pify?keyword=ce+certificate+of+conformity+example In PDF document text
    • http://jarafewig.thattruthspoken.org/uploads/1/3/1/4/131437079/1737946.pdfIn PDF document text
    • http://files.mindls.com/uploads/1/3/0/9/130969440/moxakedebum.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/1/0440/0742/4158/files/95330676298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3996/4834/files/cfr_title_21_part_110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/xajozag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/gorewanenubomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1295/1961/files/little_wonders_rob_thomas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/ethical_hacking_tutorial_point_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9259/9193/files/siruwet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3585/files/84327737605.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/moguvofazezofameduxujuk.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 1

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_off00006764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6764 5060 bytes
SHA-256: 4fb71248c8fdb5589c4dd1050efb9f60bb58782ccefedccb0f578c0f6028870e
font_01_sfnt_off00007887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7887 14072 bytes
SHA-256: 15a4bcbb6e8fde52af4d39fd56990ce7daf7f064e30dd53b4b56ba86689319ab

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