Malicious PDF — malware analysis report

Static analysis result for SHA-256 06597884eee3ae84…

MALICIOUS

PDF

44.5 KB Created: 2020-08-29 19:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a626cd713109351aa976aa0c34c04c68 SHA-1: 23c10301b64665916f49da87de88e1fb056c433f SHA-256: 06597884eee3ae84521b2acc8ac78223f4015fe0ddf6bbeb2a5d9317d1484c6c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=vintage+pyrex+value+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and appears to be a lure related to a 'vintage pyrex value guide'. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure.

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=vintage+pyrex+value+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_0bc1ede77aa94822997b17a2ec2f8ec1.pdf
    • https://static.usrfiles.com/ugd/b8c837_b818b6c3533a4e4dbe5128b69367856b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b1e7c6323bf4b9a92f753438ff76aec.pdf
    • https://cdn.shopify.com/s/files/1/0429/9233/7059/files/95753291159.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8071/files/atto_digital_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/5121/9104/files/59783035259.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/manual_do_jogador_caro.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/77311448448.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5220861ef264ef3be1f97b5886b8f00.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b723ca448249d7b193bc810be51e90.pdf
    • https://static.usrfiles.com/ugd/b8c837_c190173c940b48559d2cda89728aa1a2.pdf
    • https://static.usrfiles.com/ugd/e8506d_115dbb9f68944563a045d3492cf20ed2.pdf
    • https://static.usrfiles.com/ugd/238140_d5a31590465b48618597752e0c506f2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe9d8082320a4ceab11390cfd2e64385.pdf
    • https://static.usrfiles.com/ugd/b8c837_149507f2d77e4a9488cc1ef10ebe7490.pdf
    • https://static.usrfiles.com/ugd/6f7357_85dc0a0e4473453eb4309e5cd4cac764.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_off00006e17.bin
326229b7ec37b1f02480dd03354f83670ef13eb564440471be2c2a8dd8b47380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E17 5144 bytes
font_01_sfnt_off00007fab.bin
bbf1cf91d2635463ddd05dc36286f0ee87b5c731def5ca388dad2400f292747f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAB 11024 bytes

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