Malicious PDF — malware analysis report

Static analysis result for SHA-256 879193f5844c092b…

MALICIOUS

PDF

146.9 KB Created: 2020-08-03 01:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8270c45ff5e5e8ef050393747de57f04 SHA-1: 64ef195fe5d176d7d828708d1fbe443dbf2f22df SHA-256: 879193f5844c092be566b25c40b07c8c2100163c6977aadabf7a7fd910e6bd66
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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=enter+the+gungeon+crutch
    • http://files.dwmfoundation.org/uploads/1/3/2/8/132815752/bosina.pdf
    • http://files.conscious-pictures.com/uploads/1/3/1/8/131871823/5215534.pdf
    • http://files.borderpartnership.org/uploads/1/3/1/3/131380612/papiw_wamifelakanarow_sugonosokeleto.pdf
    • http://files.oldfieldtubeamps.com/uploads/1/3/1/3/131381900/9699994563.pdf
    • http://files.maltbyhilltop.com/uploads/1/3/1/0/131069863/6034152.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/57237083703.pdf
    • https://cdn.shopify.com/s/files/1/0432/0234/7168/files/2291388757.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/undo_last_commit_github.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/xumexudepibemujawebesiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/convert_mov_to_gif.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/zalovosurawexinugezanir.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/contemporary_management_10th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/virezukevupula.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89186344985.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/4125795931.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/nupirarakir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3523/8301/files/kopiwomukopopujigazugi.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_off0001ff90.bin
c83ebfc8f1084830c89119210192a6bca95fbd3f17c6cddaad27645908e8ea0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF90 4600 bytes
font_01_sfnt_off00020f3d.bin
5913dd8b397208d5b37198d70b5e34d642a57786d7b6bc46b401981c43fcd985
pdf-font-stream PDF embedded font (sfnt) at offset 0x20F3D 14972 bytes