Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc9e4e8da3c9b09…

MALICIOUS

PDF

40.3 KB Created: 2020-08-11 04:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5e7fb4e3c5055f219f98a7e5ac94fcb SHA-1: 24bb322f5500697664791d854c2769b2afa90aa7 SHA-256: 0dc9e4e8da3c9b09cf227e905633f55a6eda5754f3dcbe8f30006c312d14a684
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL, https://ttraff.ru/pify?keyword=absolute+cost+theory+pdf, is flagged as malicious. This suggests the PDF is designed to lure users into clicking links that lead to potentially harmful content, likely as part of a phishing or SEO spam campaign.

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=absolute+cost+theory+pdf In PDF document text
    • http://files.sarahleevoice.com/uploads/1/3/0/7/130740524/b07889.pdfIn PDF document text
    • http://files.clearhorizon.ca/uploads/1/3/1/8/131856545/1746950.pdfIn PDF document text
    • http://files.intheam.shop/uploads/1/3/0/7/130740530/445673.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/1/0428/5536/6822/files/vector_addition_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/90562155005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/taxoditemugeseluweroge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/75309923028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/15110450280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1860/0104/files/area_calculation_formula_for_irregular_shapes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1184/1958/files/44032509272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/lipunalebutiduluxagifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/mikajelarawivit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/medokogasozurikomukizef.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_off00005fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 5264 bytes
SHA-256: e20e9dcb4f5e9030465c0121d2c594c4674cfc0ad24a1dbde3d9be8886de0707
font_01_sfnt_off000071ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 10112 bytes
SHA-256: 952c7d91c652a939b11fbb2a2771ff7b5523dd5675ea73d5a5ae8fc75e2dde6b

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