Malicious PDF — malware analysis report

Static analysis result for SHA-256 4585322c9e1d4e80…

MALICIOUS

PDF

41.6 KB Created: 2020-09-02 02:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dcfad3f8576a68ff001f7b3ff88cf10 SHA-1: 42e8e998ff7bf10ffad3cb0109012d23dbcfa9fa SHA-256: 4585322c9e1d4e805c75f2b447c581599e6f0f65df8d1eddd29a095a78e58232
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, consistent with a link farm or redirection tactic. The primary malicious IOC is the redirector URL which is likely used to funnel victims to a phishing or malware distribution site.

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.club/pify?keyword=horizontal+analysis+definition+balance+sheet
    • https://static.usrfiles.com/ugd/6846fe_5dedb56fba7542ba924161dd7bc62809.pdf
    • https://static.usrfiles.com/ugd/9421c8_2bec283d6ec34771adc2ddd25ac598ff.pdf
    • https://static.usrfiles.com/ugd/1a89c8_06779d462153405b9631b646abab0e66.pdf
    • https://static.usrfiles.com/ugd/7dfe85_4fc174aacaa44255a042b265931b4744.pdf
    • https://cdn.shopify.com/s/files/1/0461/9419/6643/files/giduku.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/93284223247.pdf
    • https://static.usrfiles.com/ugd/5af86b_08aa82a1eee5441e906d2fe9a3691e51.pdf
    • https://static.usrfiles.com/ugd/d94ae5_444cced8d538474d9b4e17d23c1ad97c.pdf
    • https://static.usrfiles.com/ugd/dad90e_222acd46dbe840ba9491fd5273617dcd.pdf
    • https://static.usrfiles.com/ugd/1decf9_1c2475a6edfb47619f2f71a68070e596.pdf
    • https://static.usrfiles.com/ugd/c1de29_cefc10a1a7df463fa2381c4e1b68c454.pdf
    • https://static.usrfiles.com/ugd/b5aed9_b4185f88b79b4e1185b0474c24753c88.pdf
    • https://static.usrfiles.com/ugd/e6092c_f31de93c3bde4974a8ed547633770dfe.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_off00006384.bin
12940c3ac20b30d9b53e679a4d0ced0769281a4179d453e81a48a83e612d5e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6384 5360 bytes
font_01_sfnt_off000075bf.bin
18d2d73b3de665e8fd5577d88544d434e88546598089fb0dda79e92e0f9fa5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BF 10380 bytes

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