Malicious PDF — malware analysis report

Static analysis result for SHA-256 89eac9d26c271cde…

MALICIOUS

PDF

53.9 KB Created: 2020-08-23 02:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce831f9f3059d25a98c2601ab454080e SHA-1: 69eff118e091e2a08f378b35c1bd3f1a1167571d SHA-256: 89eac9d26c271cde393fd07cd5ca270e771b12bd2fbeebf16e5903c6ba6d7027
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=hackintosh+builders+guide', which is a critical finding. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary attack vector appears to be luring the user to click the malicious URL.

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=hackintosh+builders+guide
    • http://files.thetravellingsingh.com/uploads/1/3/1/1/131164152/244075463.pdf
    • http://rapujopi.themegaworldlifestyle.com/uploads/1/3/2/7/132740609/lemujonowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/61120931997.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/51581866450.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/84618536466.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/tl-_wa850re_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0122/5114/files/79124514774.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/ben_10_ultimate_alien_sinhala_cartoon.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/romodababob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6618/files/katumojogegoriwepen.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/mejirakuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/koratatuxodapopabomerix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/zazisogexarivepisidoz.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_off000095ff.bin
94603bcc66b70fb19b9f8ae4caa93d31bbfc2a073a1987d06dc730b189eaced0
pdf-font-stream PDF embedded font (sfnt) at offset 0x95FF 5368 bytes
font_01_sfnt_off0000a81f.bin
237101b5bafb278fa046bf48a9c611a5f607267ffe626b8112691fb7fe864789
pdf-font-stream PDF embedded font (sfnt) at offset 0xA81F 10120 bytes