Malicious PDF — malware analysis report

Static analysis result for SHA-256 6369dd10afc01bbc…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 17:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ed7f72d9682fff3a48d9d1ee472d13 SHA-1: c7d3798c6afb9db2e90a4e0cdd39a6e9c1bf97ec SHA-256: 6369dd10afc01bbc255ecc9dda7a38478c071a3b4eaf21f71564666f2902eaaa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.com/wix?keyword=residual+method+of+allocation', is flagged as a malicious redirector, indicating an attempt to lead the user to harmful content. 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.com/wix?keyword=residual+method+of+allocation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/362633_811a0348a4e448808c9546cf87694ad7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b34f62ec83c045cb9e642d86486e82c6.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_28e5cb787c3d4c48b758d58cc7e066b2.pdf
    • https://static.usrfiles.com/ugd/06497e_44167836b9d24dbabeb83e9326c62843.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/silar.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/101381705.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6371/files/leluvedopiwete.pdf
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/96360285560.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/54391794486.pdf
    • https://cdn.shopify.com/s/files/1/0466/2886/4165/files/65107067731.pdf
    • https://cdn.shopify.com/s/files/1/0439/2399/6840/files/kubunojogozunovuriju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f11.bin
a711cf3a0f52d5a534ec98f3e9705f94ed2454c2af54ad16fb173136abe8cece
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 5052 bytes
font_01_sfnt_off00008021.bin
5f18b1e6bdd425e7499c8dc71750892992f5630d717910f5ea0884404ad4dbd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8021 10440 bytes
font_02_sfnt_off0000a3d4.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D4 4324 bytes