Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e591c1890dad9e3…

MALICIOUS

PDF

32.8 KB Created: 2020-08-31 11:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1107521d72e5b1c2fe795b40824c8a9 SHA-1: ec422a7fb01b1f3866be9b1cf96b92caaf78ffe1 SHA-256: 2e591c1890dad9e3cdbab2b3d9dcbcc32013f82c8a1c94cb81a4f13a10244732
152 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier and contains a large number of embedded links. One of these links, https://ttraff.com/wix?keyword=home+improvement+1+2+3, points to known malicious redirector infrastructure. The document appears to be part of a link farm, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

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.com/wix?keyword=home+improvement+1+2+3
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/vugotejugepu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/23461286793.pdf
    • https://cdn.shopify.com/s/files/1/0439/8897/5774/files/psa_test_screening_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/rocketballz_stage_2_drivers.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_ceb26056b5454bfaab8fd511c1347d07.pdf
    • https://static.usrfiles.com/ugd/4b874d_3fe6be3bac104c138f1fd8bcd8bab504.pdf
    • https://static.usrfiles.com/ugd/b8c837_e02fd5b81f1b4eb8909d192f86466ecc.pdf
    • https://static.usrfiles.com/ugd/4d400c_6bd2c513b9694375aa405fd09b60b9dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ab3be8455ee450fb89a4cae7159f6a4.pdf
    • https://cdn.shopify.com/s/files/1/0431/0859/7927/files/97191610040.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/acatech_industrie_4._0_maturity_index.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/six_flags_great_adventure_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1237/files/gonirotafotini.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004598.bin
61bdf8313b6b68334b622102535b392f043ef4c5e2347eec8ed06a6a86626e89
pdf-font-stream PDF embedded font (sfnt) at offset 0x4598 4912 bytes
font_01_sfnt_off00005645.bin
99af7b99ac79214bcedc7ec8a302ca89bf2ebe4263c19e105f0b3e84e85cf50c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5645 9440 bytes