Malicious PDF — malware analysis report

Static analysis result for SHA-256 10844d1cab1df02d…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 04:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b35be040346e2a8303f8285c9a4efa4 SHA-1: f7624420f8f57f164c3d28c85764364962ccf002 SHA-256: 10844d1cab1df02d9df36819a42089e791c8ef923a7b80952c594edd31de0b6c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded links, including one to a known malicious redirector, and is flagged as an advance-fee scam lure. The document body, though obfuscated, contains text related to 'pmi-acp exam prep pdf' and a URL, suggesting a phishing or social engineering attempt to trick users into clicking malicious links. The presence of multiple external PDF links further indicates a link farm used for SEO manipulation or distributing malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.ru/wix?keyword=pmi-acp+exam+prep+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0384/5541/files/xaxavituroxow.pdf
    • https://cdn.shopify.com/s/files/1/0433/9046/8245/files/xidetagemuzavefisipodoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/certificado_medico_escolar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/29705898514.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/mathematical_physics_h_k_dass.pdf
    • https://static.usrfiles.com/ugd/b8c837_12c70df8f6874c928cbe2bf06766e928.pdf
    • https://static.usrfiles.com/ugd/d01287_ef0ac4e819204418a7c3d20f823358a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9464c5a347c4eaf88625084b4a2eb7a.pdf
    • https://static.usrfiles.com/ugd/3649d2_4e446b0db80a46f9a808412bd1954b84.pdf
    • https://static.usrfiles.com/ugd/9b5f63_4e3481d6e6f24a4bb2595faa45b9349d.pdf
    • https://static.usrfiles.com/ugd/60933b_d94490e2307e4eb697c66ec280df12e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7493162631d4435b092bae9165f26ed.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006743.bin
ed663664ac4964e91f5025810c84b21492b17ef83928322c46dac406c3caef11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 5192 bytes
font_01_sfnt_off000078da.bin
5152d503d839c2fa8171624e16f7f3492580262970f7ee72a1903d21d845c0ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 10860 bytes

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