Malicious PDF — malware analysis report

Static analysis result for SHA-256 366b04fa5cc72184…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 18:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ce80a195278774fa6bd187d2ac3ac3 SHA-1: 0c17da41e3960103f2df0e635d5a0fc070d7b783 SHA-256: 366b04fa5cc721845426fb10e1d9bc16b49f29e53a724521bc3ecf8474a280d4
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by a machine learning classifier and contains a large number of embedded links. One of these links, https://ttraff.com/wix?keyword=mcp61pm-gm+rev+2.2, points to known malicious redirector infrastructure. The document appears to be a link farm designed to distribute traffic to various other PDF documents hosted on static.usrfiles.com and cdn.shopify.com, likely as part of a broader phishing or malware distribution campaign.

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=mcp61pm-gm+rev+2.2
    • https://static.usrfiles.com/ugd/b8c837_3462070560c4448b9b6904571638a6a0.pdf
    • https://static.usrfiles.com/ugd/a59130_2ccc647a1d8444cd86f75bfa2a20c875.pdf
    • https://static.usrfiles.com/ugd/49be48_066e408c4a574810befe071946fc3d9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffd1bbf60eb34cfbb1c6da734c7142c3.pdf
    • https://static.usrfiles.com/ugd/a18aa6_4b60329f30464f898c7a000d9fc9241f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdc34efc87aa42328f72b61516303866.pdf
    • https://static.usrfiles.com/ugd/77eba6_a5e9c30d69934f819acb450ca961cceb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/pemuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7823/7856/files/3162075858.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/39950081492.pdf
    • https://cdn.shopify.com/s/files/1/0462/2666/9719/files/sonevodajabufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/5th_grade_english_grammar_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5722/5638/files/hornady_reloading_data_223.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/opportunity_cost_of_capital.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_off00006c78.bin
818bc889432efa3dc1752b49a30ec866fab98081ba3978609ba0be2e831f5491
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C78 5300 bytes
font_01_sfnt_off00007e93.bin
0811c6d27b3616715cea4b7245b7e913b3b01b10889f96cbe1b564e9fc440691
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E93 11256 bytes