Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d04c1ba99bed645…

MALICIOUS

PDF

49.1 KB Created: 2020-07-30 19:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b300972ad4d1ffcc01582fd404340ad4 SHA-1: 0a4a680a3e8b43cd28f93ef85e8426f1a677a4df SHA-256: 1d04c1ba99bed645155b190583172f9142bde1a17eaa4c60132561a9bfd0827f
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, suggesting SEO abuse to distribute malicious PDFs. The document body, though heavily obfuscated, contains text related to 'Bsc nursing entrance exam syllabus', aligning with the 'SE_INVOICE_LURE' heuristic. The primary attack vector appears to be a malicious redirector disguised as a document link.

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=bsc+nursing+entrance+exam+syllabus+2020+pdf+ruhs In PDF document text
    • http://files.mollymakesscents.com/uploads/1/3/0/8/130814682/9878703.pdfIn PDF document text
    • http://files.wcacreatives.com/uploads/1/3/0/8/130814070/0d79b723c11.pdfIn PDF document text
    • http://files.chapmanatsea.com/uploads/1/3/1/6/131606392/9578188.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/1/0433/7133/1734/files/jajesogamapowabasilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/99407823640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/pulebubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/906596865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/wawurumevebetozipus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/13011749163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0537/6669/files/vomefazafufozuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/metukowotefefuxesapunep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7318/3645/files/tuwemimulijukuvanexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/66472014576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/tupar.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 4

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_off00007750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7750 5976 bytes
SHA-256: e1d292c975108c2e49195e75e9bbd20e26707d212533551f811b143202cf59eb
font_01_sfnt_off00008b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7B 13888 bytes
SHA-256: 3989da49b524d5557add588dc2fe2de1fc87e2acee2178e43ffffbb929fdf0ac

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