Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94dd580fc156470…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 20:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb27e27199925ddfd2a2788aee071a8a SHA-1: 4745688d93919622771a8951861597dc12a1a669 SHA-256: e94dd580fc156470d6672a936aca3703a47c4d256ae5e9fc19c77decf1fd7bad
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=define+acquisition+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting its primary purpose is to lure the user to this external resource.

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=define+acquisition+pdf
    • http://files.chocolatedudeabq.com/uploads/1/3/2/6/132695932/6cc966e31.pdf
    • http://lirupego.blissfulbash.com/uploads/1/3/1/3/131380485/sufenuwugud.pdf
    • http://files.highdefgeoff.com/uploads/1/3/0/9/130969172/9c0607590.pdf
    • http://files.lrxkinex.com/uploads/1/3/0/8/130814132/2049138.pdf
    • http://files.soulfulnesstherapies.co.uk/uploads/1/3/0/8/130814535/4145075.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/82800561395.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/42970656192.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/44674374587.pdf
    • https://cdn.shopify.com/s/files/1/0433/7827/8563/files/ninugawobit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/animal_farm_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/campbell_biology_2nd_canadian_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/54768891953.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/75482817967.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4422/files/18471588897.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/836065632.pdf
    • https://cdn.shopify.com/s/files/1/0431/9202/5249/files/2011545421.pdf
    • https://cdn.shopify.com/s/files/1/0439/2812/5595/files/15523654244.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cb3.bin
2b5c7bf80b5468d3068fb4de4b17565d13e7040ea630e3ba48e19500979d36c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB3 5028 bytes
font_01_sfnt_off00007de1.bin
0d11887c9b50f89bc765cc0e3d45fd4af4213b558f4663b5336e82ce33f1539e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 10256 bytes
font_02_sfnt_off0000a0f2.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F2 4324 bytes

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