Malicious PDF — malware analysis report

Static analysis result for SHA-256 9572949807344b4d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-22 18:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 620eb971512b4bc335c5c8247fe91263 SHA-1: 79866e5d0eec8fc2e2f4132313a566caad932f72 SHA-256: 9572949807344b4db13f7322773f4ca6e55caa01bd55d179c831cdd7dcc39536
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious URL, 'https://ttraff.cc/pify?keyword=activated+sludge+process+pdf+nptel', is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same keyword as the malicious URL, suggesting a lure. The presence of numerous Shopify links, while many are confirmed benign, contributes to the overall link farm characteristic.

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.cc/pify?keyword=activated+sludge+process+pdf+nptel In PDF document text
    • http://jururagoz.kevinwiczer-actingcoach.com/uploads/1/3/1/4/131483152/4543375.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1303/6439/files/katapugifilonox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/34801983166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/letopapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/kudoluvalakidido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/49834898550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/zaviwegabuvofaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/40836800880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0413/3525/files/girl_butt_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/53760901738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/gujoborikobipudavo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 5252 bytes
SHA-256: 3c3efa18ecf3021028fecb38e276231acd98352579bbe0b00d2ccb335cb52e30
font_01_sfnt_off00007497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 9812 bytes
SHA-256: f96bf0822a1bd5734a10278cf5d2988d0c10137d42c38832c737f1a6b6e9f7dd
font_02_sfnt_off00009624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9624 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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