Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8aa9012060d7ffa…

MALICIOUS

PDF

42.0 KB Created: 2020-09-07 22:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ce95716fd7fc4422b40f525da775f77 SHA-1: 22dccebab1a39f42e6186beb36b210ea4c0dd082 SHA-256: c8aa9012060d7ffa40cf788a5a677a9ef8c078862c2016b221c44633a4b45b92
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/pify?keyword=aranmula+vanchipattu+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.club/pify?keyword=aranmula+vanchipattu+pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/biblia_ortodoxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/646255477.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/wijadisexogax.pdf
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/lowes_seekonk_ma.pdf
    • https://static.usrfiles.com/ugd/debbe1_134ce4b9ff3c40edace24e4e71253c57.pdf
    • https://static.usrfiles.com/ugd/93c935_19b531a975e84f698789ed296dc62f30.pdf
    • https://static.usrfiles.com/ugd/a13bc2_4931ef9920de4dd9aa2ab6d460f2b8bd.pdf
    • https://static.usrfiles.com/ugd/5262df_c52e847cc90442578f750b40f39454f0.pdf
    • https://static.usrfiles.com/ugd/23924c_1f2960232fbf41bebc7888901391430c.pdf
    • https://static.usrfiles.com/ugd/c1108c_603cec37cd74478ebed3ba91b4910fae.pdf
    • https://static.usrfiles.com/ugd/55cc32_f156ea75c07243afbdd2118fc353b5b6.pdf
    • https://static.usrfiles.com/ugd/b56239_7d1380369ffe4306b23546badd68a52b.pdf
    • https://static.usrfiles.com/ugd/eda9ba_0f6a042456ca4e5d876bf315a4c4aab1.pdf
    • https://static.usrfiles.com/ugd/aec2ea_ddcd03f4b1134ba5be38c0099f945d31.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_5ac3ca1f82d946e6b2bc11709cba92c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2905813d1b94269b7e4016a43023e5c.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_off000067c9.bin
7406917fd2bcdbfb7aa41f2de15d158410f42f8238722a794831b94e51c85b2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x67C9 5268 bytes
font_01_sfnt_off0000798e.bin
fce589595a9db0171c8a100085e905f8162f4ed0983dfef837f60c57c1ae9eeb
pdf-font-stream PDF embedded font (sfnt) at offset 0x798E 9908 bytes