Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a931119cf5c7b8…

MALICIOUS

PDF

39.8 KB Created: 2020-08-15 02:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e648ea3a129bf2ec4130c7c72796cd46 SHA-1: e060e87036048b2a5a93e3e63b245fcb86019eb6 SHA-256: 56a931119cf5c7b81447c32b982cae9182978bab0853ade8be17923f6f85308d
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=addicted+2017+movie'. The document body, though heavily obfuscated, also contains this URL and numerous other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing the user to the malicious redirector.

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.com/pify?keyword=addicted+2017+movie
    • http://files.mccsignup.com/uploads/1/3/1/4/131409128/55ec2206be0.pdf
    • https://cdn.shopify.com/s/files/1/0440/2741/2645/files/30456083224.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/fovebogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/mapix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/11233355765.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/zuzamasipelatagepu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0595/8565/files/psychology_books_in_tamil_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80835258875.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/bubble_trouble_2_free.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_off00005d89.bin
fb99364049f94f5e234a9c8d875288a885c8fd46eed3e7aaa7d30911f637f7a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5024 bytes
font_01_sfnt_off00006ea4.bin
f3dd9ad2101cb0d716f41459c9926ebd8cc30ed5c1ee5da5416c85a4c626628f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 10672 bytes

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