Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38771e8bf933d55…

MALICIOUS

PDF

35.0 KB Created: 2020-08-18 15:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98c9627aa6d28a3315b4b2b2c19dbee3 SHA-1: 2e0415a31982114de976d64b8bac463c1d60f856 SHA-256: a38771e8bf933d5573aadbfcc9801d6d057caa6c13cf7ac675fe308b92015208
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection strategy. One prominent link directs to a known malicious redirector, ttraff.com, with a keyword that appears to be a lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.com/pify?keyword=akshara+singh+ke+bhakti+gana+video In PDF document text
    • http://files.gaatn.com/uploads/1/3/1/3/131383377/7103303.pdfIn PDF document text
    • http://xumudinaz.johntstephan.com/uploads/1/3/0/7/130775565/2804037.pdfIn PDF document text
    • http://wabes.southernaznorml.org/uploads/1/3/1/6/131637306/48004e9c1517.pdfIn PDF document text
    • http://misojis.benedictportugal.com/uploads/1/3/0/8/130873851/temodokobajo-minarepulukope.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/1/0437/2873/2314/files/17673727492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/gosipitiwijowagine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/newapew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/sadusiwebadejofotenozutif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/72532188936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/zozepavepus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/14052256626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.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_off00004d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2F 5308 bytes
SHA-256: 9084e237f2697ea11d1c6745829566aeb3e8e3b009d799215dd18a56b5145d82
font_01_sfnt_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 9460 bytes
SHA-256: c366a8f2698713110f7904e5267df18f1d64006fc6675e44ed62f32df7b1a1c7

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