Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52f9b8a248ce386…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 21:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36391f1d56c6cca2f109f32f9168dd84 SHA-1: 7fc0aed12cde1f70b4f6bb9f68654ce6d7d2d6bc SHA-256: a52f9b8a248ce386be67f28d44fcf77b6adb41a762e4c28a6464f9a4f00de529
202 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body text, though heavily obfuscated, contains language suggesting a 'credit report authorization form', aligning with the SE_INVOICE_LURE heuristic. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=credit+report+authorization+form+pdf In PDF document text
    • http://paxobeza.myvietbistro.com/uploads/1/3/1/4/131437792/pemijaru-rifidajomixupel-sodopixizuratew.pdfIn PDF document text
    • http://files.diamantinc.ca/uploads/1/3/1/3/131379183/5398471.pdfIn PDF document text
    • http://files.thesickleinme.org/uploads/1/3/2/6/132681342/kizipefi_bozopizozuna.pdfIn PDF document text
    • http://satiso.avikigames.com/uploads/1/3/1/4/131438641/luvagivupuxesubam.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/1/0439/3733/3406/files/koxunovalidamotirikurazof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1285/7754/files/the_skeleton_key_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9452/4579/files/38726317932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/45231951295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4156/1503/files/vojogimunove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/fekugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/72161575454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3218030698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/d_d_5e_experience_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/85957941704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/75134360265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8125/3535/files/15052800730.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 2

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_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 5024 bytes
SHA-256: 5019be6ed20c34c19733c2cbbb8b1b995823b01a1c2ef6837334ae98d079618c
font_01_sfnt_off0000734c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734C 10272 bytes
SHA-256: 54c7e85a235b1ae702b5182c26f9b2f337985e41a69b1ea47e14a79b57286fe7

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