Malicious PDF — malware analysis report

Static analysis result for SHA-256 002c77e263e79a6c…

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 07:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 194ae5bb069d5f2557fc8ce91e0eada9 SHA-1: 8e8f151263ec263f5bd80d59e8c0469112c2617d SHA-256: 002c77e263e79a6cf49a9242d384565961a613769852c08d4e96d5768e412fd7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm infrastructure. One critical heuristic identified a redirector link to 'ttraff.cc', which is known malicious. The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking Shopify URLs, likely intended to lend legitimacy. The ML classifier strongly indicated maliciousness.

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=2nd+grade+sight+words+flash+cards+pdf
    • http://files.sterlingne.com/uploads/1/3/1/6/131607075/gofiwafevekatujuwebu.pdf
    • http://files.militaryhistorylive.co.uk/uploads/1/3/2/6/132682676/d86f027ad8cb536.pdf
    • http://files.portagecentralexams.com/uploads/1/3/2/7/132740584/pisobujuzanekox.pdf
    • http://files.marinadempsterphotography.com/uploads/1/3/0/7/130776439/4303673.pdf
    • http://kesosow.clearpathsocial.com/uploads/1/3/2/7/132740564/8435618.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/0644/1125/files/27395917890.pdf
    • https://cdn.shopify.com/s/files/1/0437/6451/4967/files/nutonijogejefogik.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/anexos_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/6195/3191/files/10760219596.pdf
    • https://cdn.shopify.com/s/files/1/0434/0989/9670/files/17017044641.pdf
    • https://cdn.shopify.com/s/files/1/0434/8248/0806/files/attila_pizza_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0427/5837/3542/files/care_credit_application_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1639/files/40444073421.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/devi_atharvashirsha_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/23376592324.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/language_development_android_apps.pdf
    • https://cdn.shopify.com/s/files/1/0434/8982/0836/files/nizogosokuriwanij.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/5379649459.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_off00006de4.bin
6a0ca7cd5782749c9c55885776952e634e3e4ec3d4833f55fabe0e8339456b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 5544 bytes
font_01_sfnt_off000080c7.bin
340435072d8de0356c79909ec8b9329d853991f6272e402566bd6c425b3af9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 10120 bytes

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