Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec0acb5da646502…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 19:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 971c3ff2658bd9674c7fa8dba1b992b7 SHA-1: e27670be6e4708883219d1b41b682a8e8fee1eef SHA-256: 8ec0acb5da6465023f4c16b27cc22c3ce13f250b4097bd59055abd47e6364e66
150 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=guided+tours+near+me
    • http://files.yeahviva.net/uploads/1/3/0/8/130813906/3337478.pdf
    • http://files.dafniantonarou.com/uploads/1/3/0/7/130740624/5b84b81.pdf
    • http://files.metalheadphotos.com/uploads/1/3/1/8/131860204/f8b9df19c9.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gadawatozuwagujezudoru.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/xefurimakesorajojo.pdf
    • https://cdn.shopify.com/s/files/1/0452/5244/4320/files/mathematical_physics_hk_dass.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/ramas_terminales_del_nervio_facial.pdf
    • https://cdn.shopify.com/s/files/1/0448/1161/6418/files/complex_numbers_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/kaseniranosuwunenux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60527157158.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/kusekidodazeradopedofub.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/8297393561.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/16980403524.pdf
    • https://cdn.shopify.com/s/files/1/0440/1466/5878/files/b_v_raman_astrology_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2045/0973/files/11050043636.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/blaise_cendrars.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_off00006bc7.bin
885f4dc755cf9e741d9a1fb53d6cdb0ae8c75b5c386a0f92f3d940a3be0bd31f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC7 4968 bytes
font_01_sfnt_off00007c8f.bin
0385b6b877f3f33d0125ed5c35b1bea0e8d67007a88aad15031f58dac832c819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8F 10300 bytes

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