Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc442a3619f1929…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 04:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 176fcdfa79cdddcfd3d60aa4321e0968 SHA-1: cd019243b3541460158c4ed7b754440c814d13fd SHA-256: 2bc442a3619f19297b9b938f13354b40caea66feb2416f0c63882573ccfe023e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=social+media+marketing+strategy+pdf+thesis'. This indicates the document's primary purpose is to lure users to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, suggesting a broader campaign to distribute malicious content. While no scripts were extracted, the presence of the malicious URL and the ML classifier's high confidence score strongly support this assessment.

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.cc/pify?keyword=social+media+marketing+strategy+pdf+thesis
    • http://files.homewatcherlv.com/uploads/1/3/1/4/131453031/635387a68.pdf
    • http://files.lindavergnani.com/uploads/1/3/1/3/131381607/9043551.pdf
    • http://files.tylerdiscoverslife.com/uploads/1/3/1/8/131871622/bopukigigo_pabix.pdf
    • http://files.shopflawlesshepcat.com/uploads/1/3/1/6/131606368/welig.pdf
    • http://files.mississippimudkennels.com/uploads/1/3/1/4/131410747/b60a8a.pdf
    • https://cdn.shopify.com/s/files/1/0438/2805/2130/files/sewepurame.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7434/files/11119072631.pdf
    • https://cdn.shopify.com/s/files/1/0434/1458/5509/files/setting_aside_arbitral_award.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/nataximesitazutopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3193/6674/files/lofukaroxud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/parowetuwaxiniriri.pdf
    • https://cdn.shopify.com/s/files/1/0432/4448/6824/files/55844047051.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/74228507727.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/computer_concepts_2014.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/39389016200.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/pisurewaxipuwonasodipotu.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/barrela_plinio_marcos.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000765d.bin
fec4ec690b31a87fcf5f1ded475fbe6f5eb37f3aca1807447ff209ac68944716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 5836 bytes
font_01_sfnt_off00008a22.bin
f0930d2ba1eb120a7ab8c482bce8a172283be4d4fee4f86370fa54c7dc293031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A22 10656 bytes

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