Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafafbe9a3751d59…

MALICIOUS

PDF

42.7 KB Created: 2020-09-05 05:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c782b51c4c6bfd86e81c420992bf6aff SHA-1: e8fca237c98d9ee7170fc51afa9e335b73026505 SHA-256: fafafbe9a3751d59951ddeb3cb22133ad5c845cff6c6b056990c17ea99ab026a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to PDF files hosted on Shopify and static hosting services, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.cc/pify?keyword=ballade+in+g+minor+pdf`. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious content.

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=ballade+in+g+minor+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/tojakagebelifokef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1116/2790/files/aquarium_game_free_full_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4292/0865/files/honeyguide_khoka_moya_tented_safari_camp.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ee4d88_2c920cd8ef24434cafac84345d00ae41.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b27199_6808e35b8f7f4d12bce76ba648b0589f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a245929504a444c6b1b6c2df20d37b56.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a2a6c8fbb3504d82b26f3919f6b39bf7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a640e9_d40a25963420452ea864147ca88f0d7b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/017c44_0f5380713c48434e9b2678f367206d3c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fc840b_30c3c5d2983a4b6288987aa834638ae7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d1e4da36dce141feb0eaf4e5a9f6c9eb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9c8fb9_fc12701e3ba947e395b9b38cb9bda33f.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A98 5232 bytes
SHA-256: 108e954bc3e5d149bfe2d63fdff34c54ee0fe5bf71688cf45e4be8297b2b4cbe
font_01_sfnt_off00007c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C53 10040 bytes
SHA-256: abeb420dc9ee1cd908ea6b91d93afe56e9495e4596a87d1538f75cd370f5c06e

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