Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc71a508b96b2b4…

MALICIOUS

PDF

52.0 KB Created: 2020-08-14 12:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc256ac559cc75fa917af05f6be85b3 SHA-1: 0f447fefe2907a4acbda71437654108778484a57 SHA-256: 1cc71a508b96b2b4a8a4bd0a40ebf1dcab8acab94f9e0ce803828bcdb66f1fc3
150 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK directly points to the malicious infrastructure at 'https://ttraff.cc/pify?keyword=batman+arkham+city+prima+guide+pdf'. The document body, though heavily obfuscated, contains this same URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=batman+arkham+city+prima+guide+pdf
    • http://files.jesseswarriors.com/uploads/1/3/1/0/131070374/fosasumatu.pdf
    • http://lemesako.cariboucafe.com/uploads/1/3/1/4/131454024/2331530.pdf
    • http://noziva.brisenodds.com/uploads/1/3/2/8/132816066/8282708.pdf
    • http://files.theironox.com/uploads/1/3/0/7/130739835/e9b743b21b9.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8272/files/10836947291.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/22691586886.pdf
    • https://cdn.shopify.com/s/files/1/0434/9214/7366/files/81032258865.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/building_construction_illustrated_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9825/0146/files/haldol_decanoate_package_insert.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/mcdougal_littell_geometry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/bunifedatodidaziruporup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/rewasesifezodakixoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/40168936885.pdf
    • https://cdn.shopify.com/s/files/1/0433/2191/7598/files/6371209998.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/52425440260.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_off00008da8.bin
be18216bf3a0242e9d57ebf3d2ae4e23779db710ee80c66322d02fd0955779e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA8 5572 bytes
font_01_sfnt_off0000a07c.bin
a749e8bd960d8e025b9cb941272981d9bf84d88fa540e6b7385adf3300e81056		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA07C 10032 bytes

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