Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a0e1baeff76b48…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 14:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb77b5bbc5c2da44a149805db60a1c28 SHA-1: 7de29a0bd564999531854e81b71d3a18b15ceaf5 SHA-256: b2a0e1baeff76b48874384ab2389081d22fd3adb1249338e28bc3444732a7b58
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a sound engineering syllabus. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the target URL and references to a syllabus, supporting 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=sound+engineering+syllabus+pdf In PDF document text
    • http://files.freedomdayusa.org/uploads/1/3/0/8/130873922/e8359ee.pdfIn PDF document text
    • http://files.cynthiawidawski.com/uploads/1/3/1/1/131164081/pujopupiperaxifuk.pdfIn PDF document text
    • http://files.deromelab.org/uploads/1/3/0/8/130873718/5663959.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/1/0430/3070/8375/files/pokixorojimubaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0777/8717/files/kulerobosapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5658/7174/files/greasemonkey_cookie_injector.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7840/9622/files/41613012737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3687/6695/files/minusezetegunamux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/20995293216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/se_binary_not_responding_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/xavuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/guzejalumitap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/rarafubaboduvikoratakiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/80220368395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/97155224427.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 6

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_off000072ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EF 5556 bytes
SHA-256: 5a94134ac79b625407e5b0037cf5b17a959f55ca621051e4b3315e4730fa3b7f
font_01_sfnt_off000085e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E4 10304 bytes
SHA-256: 09bd43ac47088a176e49fe054dead2f2b7b5d010cf61bb6fdcf71441a01d4fb9

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