Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abb9721ed98fccf…

MALICIOUS

PDF

69.9 KB Created: 2020-08-29 18:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e03f5b0076f1c824e0865e9b14afa405 SHA-1: 35d2ad00942713c2119256a2dd4fbed952239ada SHA-256: 7abb9721ed98fccf7e018d5478526473c082e668d69ea72e6eda0829bbd9f2fc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.link, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the target URL and other benign-looking URLs, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=congruent+shapes+definition
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/axis_and_allies_miniatures_expanded_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/solvent_extraction_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/fixofisabilafijetitobixiz.pdf
    • https://static.usrfiles.com/ugd/b52961_3f27170d9c9647d18d5bd5a5322652fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_220d34b0ee7145bb91b7869276fc9fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_03bf2dfd9933425cae8f218b2b000666.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0cc46f18ff542b3bfe17710fee3003e.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bd70585d6d14b55b562ffd30a412f7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1505b55887c0471ea6653e924c00a7b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f594087dc04933bad9918a5812b228.pdf
    • https://static.usrfiles.com/ugd/b8c837_172d42e92ff247ad86fd322153d4e154.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4aa6b03043540a28a1ca0aa45a52158.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000d597.bin
72c763e1beabb54a5c5ef8db17e1b5b953490c7aef0e4226ff71a869445ec562		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD597 21284 bytes
font_00_sfnt_off00006941.bin
b0bc88dd340da33ddb9ea3c1fddb0c02df07030b16c7902ae228c3c9a43a2a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 6976 bytes
font_01_sfnt_off000080ed.bin
ed1a94efc6c50e124e672c7e645b2c74883e02cb0e660de625a7a7225d9a22ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 5176 bytes
font_02_sfnt_off00009277.bin
7b464707c0eaa30958b93d54919f5b88879fd6e3da66faf966d6faa7b4d5db61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9277 9236 bytes
font_03_sfnt_off0000ac20.bin
9d08ae1f1bc9273bb889303c0c61b1b8383b77e1b316553266f732e08a1620de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC20 13104 bytes
font_05_sfnt_off0000f930.bin
08007f9765dd067db74e398585c4ef98efcc064464026f5506ef24429a840106		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF930 4264 bytes

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