Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a11c34ec3c32a47…

MALICIOUS

PDF

53.3 KB Created: 2020-09-01 21:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31797dffad221e053bc8ababc18004a SHA-1: 0573a1c84e92a178d3a1c8f3844e21480210ad09 SHA-256: 0a11c34ec3c32a471fb916a1da19abeee7802d0f7d1f3273bc94346ff144fa1b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=baptism+of+fire+guide+kingdom+come'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign but serve to obscure the malicious one. The document body, though heavily obfuscated, contains the malicious URL and references to 'Baptism of fire guide kingdom come', suggesting a lure.

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/wix?keyword=baptism+of+fire+guide+kingdom+come
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e736227da9c45b5bb0b3c9fcb3d05c2.pdf
    • https://static.usrfiles.com/ugd/b0cd75_57c44851a89e4f40a60a301a63726364.pdf
    • https://static.usrfiles.com/ugd/1c90dc_e8cd6ecef7cb41e4a470dc7c07d7c95d.pdf
    • https://static.usrfiles.com/ugd/b4609a_539ebed569fa4603a3cf42677f4441a4.pdf
    • https://static.usrfiles.com/ugd/804ff6_4b0e7e73fb244332ab53d550f79c0f99.pdf
    • https://static.usrfiles.com/ugd/67e251_015e2832afca4a37a8afaafed9fa8f4e.pdf
    • https://static.usrfiles.com/ugd/cc03df_37d8c5e083ca4e44b7a232d51df1bb5d.pdf
    • https://static.usrfiles.com/ugd/9e14ca_22b389b555a74e868dadf13d66a29bf8.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbefe847cd8746febe31c723a7bbdeb0.pdf
    • https://static.usrfiles.com/ugd/353d00_809cdb62bdc942d6a84ea6075e921c4b.pdf
    • https://static.usrfiles.com/ugd/3649d2_b3bff3902f5b4188bb514d95e35c2a41.pdf
    • https://static.usrfiles.com/ugd/2e79a6_46c900d722a2463787492d35be71f398.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_237b7134ee134a4da2bb2465b3b640ed.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/lego_city_my_city_2_games.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/mufowixupijusenekowomopir.pdf
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/gst_books_for_ca_final.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_off000092ab.bin
194da9de02b5bc11c40cbd873f222ee031cc0ba91dc719db893c939d4ed5a98f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AB 5556 bytes
font_01_sfnt_off0000a586.bin
42fb0e809094d46ff4da301daecdf2c9c70a6bd0ea2a4908aae85b9c1e5a42dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA586 10192 bytes

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