Malicious PDF — malware analysis report

Static analysis result for SHA-256 4094bf9a93b638d3…

MALICIOUS

PDF

41.9 KB Created: 2020-08-21 05:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c898a94852050bc17a690936b60ccbfa SHA-1: cd60bfc893fc86c5fccbf8188046f12354694968 SHA-256: 4094bf9a93b638d38fba6f110ed1087856c6ccbbb6b7cf1cb2bd63c57a6767ee
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link pointing to a known malicious redirector. This suggests the document is designed to lure users to malicious content through a chain of redirects. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body was heavily obfuscated.

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=harry+potter+platform+9+3%252F+4 In PDF document text
    • http://files.affordablestoragesanangelo.com/uploads/1/3/0/7/130775958/456a51bf2939.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/1/0427/9664/6556/files/66244985323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/8975588219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/72330214522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/pozun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5078/7231/files/74145046362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wanamigogagudetafisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5493/7765/files/bakowajovugemotevanib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/t_spin_tetris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/pepefovubitakaxazasad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/wepidejajetodaru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5122/7048/files/mizej.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 3

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_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 5376 bytes
SHA-256: 87327080b4570501e698a44c091a72643622cd85cc87e6f3582d66d4b0fd4ed6
font_01_sfnt_off000075c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C6 11232 bytes
SHA-256: 01def1914dd8b1b722cf984ad61d2f5a0246c29b83198877b3e4063c79ffce35

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