Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de525185a173742…

MALICIOUS

PDF

44.7 KB Created: 2020-08-22 17:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aec0ff94cb8015b5a9900944b12681f3 SHA-1: 0629bd1d774866d23d7f4c2766d753e36eff1ba5 SHA-256: 1de525185a173742015f65cdc7b8e3bee941b4434c7eefa03a9225f172034c32
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains text related to a 'management representation letter for tax audit', suggesting a social engineering lure. The presence of numerous embedded links, many pointing to shopify.com domains hosting other PDFs, indicates a link farm or a method to distribute further malicious content. No scripts were extracted, but the primary attack vector appears to be directing the user to malicious infrastructure via a deceptive document.

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=management+representation+letter+format+for+tax+audit In PDF document text
    • http://files.24millstillrd.com/uploads/1/3/0/7/130739298/315719.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/1/0431/3805/6354/files/vajolubilodagonif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8776/4387/files/weathering_with_you_trailer_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/javimakesuloxene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2657/7565/files/38137724312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67572949107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/52753692012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/dark_vengeance_40k.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1926/2363/files/salesforce_lightning_design_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/bojinoxilif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/your_lie_in_april_music_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/86003855722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27055139941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.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_off00006f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F17 5436 bytes
SHA-256: b2a76dc89a56570b27ac381e772e5a3590d69d49326267333f758f215565188d
font_01_sfnt_off00008182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 10532 bytes
SHA-256: a86cd5f27878239df4810d9df617b646d62c3d2bb25be6a6add59bd1355cc715

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