Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dba2d1ae77097a0…

MALICIOUS

PDF

33.6 KB Created: 2020-08-21 01:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb7d68a62167baa2fdca59bb0df49549 SHA-1: c1ef939a8736b8edf4cc2d4fe3c2bd3108ecf167 SHA-256: 8dba2d1ae77097a0279718ed30cf718a47a46a6d9fa1a9c44e0b00363f758d01
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the title 'Spongebob theme song instrumental' and the malicious redirector URL, reinforcing the lure.

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=spongebob+theme+song+instrumental In PDF document text
    • http://files.bcdpartistry.com/uploads/1/3/1/3/131383931/5445231.pdfIn PDF document text
    • http://files.nadjalitau-photography.com/uploads/1/3/1/1/131163927/752769c31d396f.pdfIn PDF document text
    • http://jonifiwux.thomasmusehold.de/uploads/1/3/0/9/130969754/8631485.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/1/0437/0209/1929/files/alkyl_substituents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2171/3060/files/nuzatotunaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9934/9407/files/ecologia_microbiana_y_microbiologia_ambiental.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7742/files/sizamifalidiwodogod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/amazing_grace_g_major.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/zabasizadibonorim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/53907969138.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 7

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_off00004568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4568 5476 bytes
SHA-256: 08b253f6ae864ee29897023e9a199af61ed256894c39556645b836eafb460cba
font_01_sfnt_off000057cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57CF 9956 bytes
SHA-256: 7bd535f1ee66ba40b059e0482a299edece9db9ba3053b2e0f5ffa3abdcd0c810

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