Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fc5dea6d946fb7…

MALICIOUS

PDF

48.6 KB Created: 2020-08-13 15:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f927fa38ab541b41723b1d2846c8f97d SHA-1: 4da5ccd1078d9af1d79e727495e67c211a929f7b SHA-256: 63fc5dea6d946fb70a2f898c0c99f9efc49a26f8067811f5161a0e70fe839f94
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector service. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm designed to direct users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links suggest a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=jurnal+fenomena+adsorpsi+pdf
    • http://files.laceramica.studio/uploads/1/3/1/8/131856539/ff53180a2c.pdf
    • http://files.bencoga.com/uploads/1/3/0/8/130874368/29c06bb50be3bd.pdf
    • http://files.londonhalleditions.com/uploads/1/3/0/9/130969710/25141cb.pdf
    • http://bewat.learntorideridetolearn.com/uploads/1/3/2/3/132302978/ed680c2bf72f9.pdf
    • http://files.handymanloganut.com/uploads/1/3/2/7/132712315/08f9e4b48fd1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/kinutumawiroderupukawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/foxoxuwagobirafalinek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/36017809065.pdf
    • https://cdn.shopify.com/s/files/1/0437/0336/9878/files/gijafavopud.pdf
    • https://cdn.shopify.com/s/files/1/0448/4536/7453/files/machines_of_loving_grace.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/4366021245.pdf
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/99906366856.pdf
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/bulusexadogutokiniji.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/nexivofogujozigexopoj.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/fukalotemopajugajifoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/26942451173.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/diagnosis_of_benign_prostatic_hyperplasia.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_off00007ccd.bin
729b792d2a48357943be78cb6fa86e70ceb3129414bd25c08ba1453f3b391c80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCD 5176 bytes
font_01_sfnt_off00008e57.bin
61b4c20e8cbc570f17899ab37d31d8a6eba8d874b8fcc506dbd639cf80bad5f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E57 10904 bytes

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