Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e793e98aa0d2f3…

MALICIOUS

PDF

32.9 KB Created: 2020-09-01 01:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2df7fd76add0a3bb8809773fdc622a3 SHA-1: f34ac4b1fa94984f9a9e153bda5f0ff14cf89b03 SHA-256: f7e793e98aa0d2f363b333ef8c06d6b674d96ce6e9ff423a55cbd6041d468059
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests a phishing or scam attempt where the user is tricked into clicking the link under the guise of viewing nutritional information.

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/pify?keyword=caramel+cake+nutritional+information
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/vipibifobotanor.pdf
    • https://cdn.shopify.com/s/files/1/0440/1001/2837/files/cricket_match_game_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/gadagijaturabubowovemog.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/67001390605.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f85b41274d472883a1862f60b0a4f1.pdf
    • https://static.usrfiles.com/ugd/1c90dc_09970e8af6e548959447fc03cc9cbb24.pdf
    • https://static.usrfiles.com/ugd/0d2908_0c9c7ab284834e7ebd72a763ecf93b12.pdf
    • https://static.usrfiles.com/ugd/b8c837_04709d29d7f440bb9faddb0415b5f13f.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_aeeee936379344ecbf336c4b93be5d6f.pdf
    • https://static.usrfiles.com/ugd/3dd68e_6d8fa5dec5534f5aa0fd864ed0070225.pdf
    • https://static.usrfiles.com/ugd/c3f88d_241711ae44b544959bf26b42b977daef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1560/files/81898790225.pdf
    • https://cdn.shopify.com/s/files/1/0462/6618/7933/files/40583869040.pdf
    • https://cdn.shopify.com/s/files/1/0428/2384/3996/files/sukipukimobunudun.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7122/files/evenflo_crib_assembly.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_off000044e7.bin
944875aad64095efb154658dfe40dfbaf3e56203bf97bc9599996177a94d7d47
pdf-font-stream PDF embedded font (sfnt) at offset 0x44E7 4820 bytes
font_01_sfnt_off00005532.bin
248b653c3c13fd5a9c196a1c1884bd93d7163d3ae1e19db40ddfad0917a7a7fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 9704 bytes