Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0330eab8dc9f6d…

MALICIOUS

PDF

79.3 KB Created: 2020-08-08 08:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa5462907a6fee0dbdb571375b503822 SHA-1: 164631e412a998e9dadd6e529727082ad0db3840 SHA-256: ad0330eab8dc9f6d46de7f4b023f19db99e9d10e0de06d7bfc7bdb94e3e6c335
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=analysis+of+merge+sort+algorithm+pdf', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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.com/pify?keyword=analysis+of+merge+sort+algorithm+pdf
    • http://files.seasonsheart.com/uploads/1/3/1/8/131857626/3104764.pdf
    • http://files.loveaprillove.com/uploads/1/3/1/1/131163920/xapakuzazixe.pdf
    • http://files.konjstudio.net/uploads/1/3/1/3/131398367/025db10a4a1e.pdf
    • https://cdn.shopify.com/s/files/1/0439/2602/8456/files/22902024020.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/55618246920.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/zofatejeniduwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/61617464387.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/anatomy_of_head_and_neck.pdf
    • https://cdn.shopify.com/s/files/1/0432/8108/8670/files/bacteriophage_vector.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/54812755864.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/asfixia_perinatal.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/matepeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/56015719507.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/embryo_development_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/goxis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/rokakojif.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/sesotijatepafon.pdf
    • https://cdn.shopify.com/s/files/1/0446/4692/4451/files/metro_map_moscow_in_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d696.bin
e80b34f5664ce50f6c0200519ec105f04ab1a4c9b71ccb6e34c8b893becbabf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD696 5544 bytes
font_01_sfnt_off0000e94f.bin
6e28082fe0196a28fafe07290b5a6d65fe09f9990e5cf5f73157992649090150		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 15476 bytes
font_02_sfnt_off000119cb.bin
39f13e6fbe6c0330cd2ae838d228f977410cfdb5ace03d6fcbfe8825bffa58d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CB 16296 bytes

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