Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f258d033f15304…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 18:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3ae33448ad1815f75a1d10f5e66d926 SHA-1: ffc28c68fb3218dbcf6318cd5371510f4380efbe SHA-256: 22f258d033f153045455b75085ffe0fe8e3832e9d4fb917777fd2676eac40565
152 Risk Score

Malware Insights

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

This PDF document contains a high number of embedded links, many pointing to external resources, a technique often used for SEO poisoning or to host malicious content. The primary link directs to a known malicious redirector, 'ttraff.com', which is likely used to obscure the final destination of the attack. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=gantt+chart+excel+template+xlsx
    • http://manowiji.maranatha-baptist.org/uploads/1/3/1/4/131483334/4012872.pdf
    • http://files.pierceschoolmusic.com/uploads/1/3/0/9/130969470/3427017.pdf
    • http://files.wcfs.net/uploads/1/3/0/7/130775747/gomiguzonitupejofel.pdf
    • http://files.boys-2-men.net/uploads/1/3/1/0/131070526/tofopexovu-sezinovutubukil-gobabakikexe-wejizetezu.pdf
    • http://files.eldiablo.ca/uploads/1/3/1/3/131381109/zulez.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/48770632990.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/81812937289.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/subject_pronoun_and_possessive_adjective_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/0519/7985/files/39992609383.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/modul_akuntansi_sektor_publik.pdf
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/elder_abuse_mandated_reporting_massachusetts.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/zapirigezutibawidaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/beijing_subway_map.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/93603201676.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/51594487112.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9252/files/zanibetekerubuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/duplicate_pan_card_online_free.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_off00006556.bin
f89d32ae64ecbaf51b06283359463ffa72df1baa4a3e2862e2533a713a0e6c89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6556 5272 bytes
font_01_sfnt_off00007719.bin
fdbb757a62969af86031e37c6534e025390b70f50c1acb1676626cdb21dadb18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7719 9660 bytes

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