Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eed63f6c88938c5…

MALICIOUS

PDF

50.5 KB Created: 2020-08-15 08:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58384a2a14e9175166a8502a1408e83a SHA-1: 5e4d97f3db1ca0d2fb4cb6dfb7fa420e253a3f1f SHA-256: 2eed63f6c88938c59989001c5b6f0e72b36e380648731bf9bd96bf436d2c31ca
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=sat+subject+verb+agreement+practice+pdf'. It also contains a heuristic for a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf'. The document body, though heavily obfuscated, contains text related to SAT subject-verb agreement practice and the redirector URL, suggesting a lure to trick users into clicking the malicious link.

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=sat+subject+verb+agreement+practice+pdf
    • http://lifexu.carpentershousebc.org/uploads/1/3/1/4/131454065/kepavabirivet-noxur-devisiwoj-baribonimoduxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/toxiletidago.pdf
    • https://cdn.shopify.com/s/files/1/0447/6980/4439/files/abbreviation_list.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/38935736547.pdf
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/btec_sport_level_3_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0875/files/nabucco_libretto_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0435/3182/9412/files/fundamental_physics_constants.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokisesuzarutaxiwiru.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/47210557726.pdf
    • https://cdn.shopify.com/s/files/1/0435/3386/1018/files/pathology_mcq_robbins.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_off00008602.bin
7e8b7b675b9d97a765f170536faa865cd3fd95b019560c8c7a51f0e455566b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 5824 bytes
font_01_sfnt_off000099bd.bin
c6c0731269ff1817693c693e2301e20628f7096d93a46f6ea12d311d044a37b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99BD 10404 bytes

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