Malicious PDF — malware analysis report

Static analysis result for SHA-256 a679e43910000458…

MALICIOUS

PDF

43.3 KB Created: 2020-08-31 09:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f6a8293cdae679492f9d6e049daae0 SHA-1: 7b80cd420c933000689ac9e06810747d8f891033 SHA-256: a679e43910000458f4cff8cb159380d7efdc793aac97bf420fc8fa3e79e41791
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=imagenomic+noiseware+photoshop+plugin+free', is designed to lure users into downloading potentially malicious content by masquerading as a free plugin. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm tactic to improve SEO and potentially distribute malicious content.

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=imagenomic+noiseware+photoshop+plugin+free
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/oven_roasted_vegetables_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/27872919939.pdf
    • https://cdn.shopify.com/s/files/1/0460/1502/1223/files/gajotejutonenipawuwunata.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/1471904272.pdf
    • https://static.usrfiles.com/ugd/ee6770_e089744d889149e980ad81b0e61b5b01.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_2310ab1562d8406e985a6a7faaa7fe6a.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/state_fips_codes_csv.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/50876443104.pdf
    • https://cdn.shopify.com/s/files/1/0432/7338/8190/files/vonafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/momentum_and_impulse_worksheet_answers_cstephenmurray.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3873/files/wekizabelakogujisubazako.pdf
    • https://static.usrfiles.com/ugd/5af86b_2464da339ea14f5e8cef0e6d45e39bbf.pdf
    • https://static.usrfiles.com/ugd/dd4472_2fa3a7c06ef044e181c14975495d0677.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_off00006326.bin
5009670013713bc539d7fd2c95d08f9633f54ed3c7780d560f11d34abe0ae1d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 5456 bytes
font_01_sfnt_off00007598.bin
e3a9a63da754592f8ccdbb722a3bd42bec9257d078d7735129ca58aa5376b6b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7598 13612 bytes