Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a38f8e71d1aab50…

MALICIOUS

PDF

38.0 KB Created: 2020-08-29 13:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07567530b57cb077b1b118021da6f7c8 SHA-1: e169716249cd609499c42b32d114702da094cbba SHA-256: 6a38f8e71d1aab508586e375a3ed4c5e426634fc5879c914ec0a4eeedfbb2bc2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially garbled, includes the phrase 'isaiah rashad smile download mp3' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting a malicious intent to drive traffic to potentially harmful sites.

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.ru/wix?keyword=isaiah+rashad+smile+download+mp3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_67660d60ef52465fa2f1dc49f206c923.pdf
    • https://static.usrfiles.com/ugd/b8c837_898e8e7762264120a1679a80c3bdadeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fc6c97f93bc4691a976cd63338b8b70.pdf
    • https://static.usrfiles.com/ugd/7ff653_27f99c01a0e743e995d640510cdde55d.pdf
    • https://static.usrfiles.com/ugd/4dd980_a244bb7435c0425195795f481133d47d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a538c46f3e7540e2b482ad1377d0217a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffe18ebf45f244ad9de6b3ea605aeb29.pdf
    • https://static.usrfiles.com/ugd/b8c837_00191878d2d44b108b73b7e30072052f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0588d48a38b3407ba93de509ed60e423.pdf
    • https://static.usrfiles.com/ugd/b8c837_61dc039615f94bcd81525e48d6b394d8.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe4db59a38d34125ab614f0278647cb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f30c5b81840947059d01847d45cdc094.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa95854cc88841c696f29247252cd6fa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/jotadanazolim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050e0.bin
dd89fda430cd34e5267d3a02aff1d27afb8a3542d31178f810fe669b793698a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x50E0 5392 bytes
font_01_sfnt_off0000631e.bin
3a40491c0c1f84e3cc279227f40f2c94f51a8b713a92326313793369fbf5fbaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 11572 bytes