Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a11361dc68dab…

MALICIOUS

PDF

39.6 KB Created: 2020-08-15 07:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87afe86b0ae39421f3a3ab93787ec82a SHA-1: aa086cd003ec924aabc1ee24f54818679ba4aefc SHA-256: 000a11361dc68dabaa33a55aa98588121205dd81a412513b6b4a42877a3108de
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=printable+focus+wheel+template', which is also listed as a malicious redirector. This suggests the PDF is designed to lure users into clicking malicious links, potentially for SEO manipulation or to deliver further malware.

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=printable+focus+wheel+template
    • http://dolet.rebeccathein.com/uploads/1/3/1/6/131636648/fazawiligebusidebob.pdf
    • http://files.ozhiking.com/uploads/1/3/2/6/132681452/2420674f790a6.pdf
    • http://files.perfxhockey.co.uk/uploads/1/3/1/1/131163516/jodejuzuziwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/jukupuwekukamiveli.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/44022946935.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/mud_logging_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/appsc_group_2_syllabus_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/a_b_c_d_chart.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/pabonusur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/gosupirok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/wibaxivexuvali.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/tunoguzawulumutejav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/53738423712.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/nba_2k14_cheats_xbox_360.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_off00005c41.bin
3c7e896ffb7eea7f13144950de962faf20ec078838dc75c6f3344d76b68f1464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C41 5488 bytes
font_01_sfnt_off00006ec9.bin
27ddae113d8cc53e2cd0107a4526c443d91c3427e84f6839408e5deb3e2cecb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 10260 bytes

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