Malicious PDF — malware analysis report

Static analysis result for SHA-256 f122df87a7c6eb44…

MALICIOUS

PDF

43.8 KB Created: 2020-09-03 09:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d01087d2db9ebd7c5bc17de85ed5d760 SHA-1: 016f11d382899c99835f7adc68be7c30cf9c4861 SHA-256: f122df87a7c6eb44332efcfb88482ae1fda7adeb9cc54473b68084e9ccdb3f7b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of multiple links to external PDFs, including one identified as a redirector, suggests a campaign focused on driving traffic or distributing further payloads.

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.link/wix?keyword=autocad+software+free++full+version+2015
    • https://static.usrfiles.com/ugd/314c35_b4530283190e4b4fa8c0961fa4fd497e.pdf
    • https://static.usrfiles.com/ugd/3b0c81_60291ef39cc74b32bd77821370acd12b.pdf
    • https://static.usrfiles.com/ugd/f515ca_cdfdfea06c904b83a6bad4df6bedc376.pdf
    • https://static.usrfiles.com/ugd/576447_125ccf5d6dc04cb0ba5aff6cfe268714.pdf
    • https://static.usrfiles.com/ugd/b8c837_5503682375f64e54a3e89ee9cbca0933.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5395/files/vurozipunofexazijupininif.pdf
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/19985657139.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/79084032203.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/61614806135.pdf
    • https://cdn.shopify.com/s/files/1/0436/5231/7342/files/68507453815.pdf
    • https://cdn.shopify.com/s/files/1/0436/2554/5890/files/encyclopedia_brown_book_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/1048/0533/files/gunobi.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_b0e443cd484d47f69c7fe80979ff43b6.pdf
    • https://static.usrfiles.com/ugd/4b874d_828b3c2051f3456180461187198d88b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9d89722f75f483983a8e7d72e5640f8.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_off00006677.bin
07278bd6d7d568fcbc8fd4e77e0f566a38f71fd859cfd60d93692c11d65b21b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5604 bytes
font_01_sfnt_off000079bb.bin
2e80ce365490c2465146f457a343ca75a1d7c7d908163a38ec4cbb6bbf5a6ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 12636 bytes