Malicious PDF — malware analysis report

Static analysis result for SHA-256 2736a2a27b5c1e3f…

MALICIOUS

PDF

54.0 KB Created: 2020-09-01 00:19:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2570da8b5a5da7652ce459a7d0730584 SHA-1: 56ba0e87991c7d5f56551f090b2bcb1bac01e37e SHA-256: 2736a2a27b5c1e3fde85a08a7e9f333468883592fe506a1aedce497d3d39fea0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a guide for 'Diablo 3 reaper of souls ps3'. This heuristic, combined with the ML classifier's high confidence score, indicates a malicious intent to redirect users to harmful content. The document also functions as a link farm, pointing to numerous other PDFs, likely for SEO manipulation or to distribute further 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.com/wix?keyword=diablo+3+reaper+of+souls+ps3+guide
    • https://static.usrfiles.com/ugd/b8c837_4b36690e44f14102b07a6aeeb259cabf.pdf
    • https://static.usrfiles.com/ugd/07e02c_0f42edd9236f492187151964da5842c5.pdf
    • https://static.usrfiles.com/ugd/278743_436892b6015c4eada650d62447dfcca4.pdf
    • https://static.usrfiles.com/ugd/e2b09b_740761e168994857987bc685eec9881c.pdf
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/627775738.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/nelenut.pdf
    • https://cdn.shopify.com/s/files/1/0430/1173/5705/files/jezevogesinifodanariga.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/68457746565.pdf
    • https://static.usrfiles.com/ugd/1df9ea_6feab3de767640d9802878d843a888bf.pdf
    • https://static.usrfiles.com/ugd/77d535_58d7830212b7422d9f8fbbd2e340611b.pdf
    • https://static.usrfiles.com/ugd/ed64d2_3e31e901790d4a5aaa1cb9bd8c2c4700.pdf
    • https://static.usrfiles.com/ugd/b8c837_3662aec4e0c945e5b011eba02bae30d8.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089bf.bin
4d2a4197fec1e26e4aeab16f7632f680e6fe3111659a00f4250be771822bcf07
pdf-font-stream PDF embedded font (sfnt) at offset 0x89BF 5208 bytes
font_01_sfnt_off00009b73.bin
b3f82cc4413d8bce9f73cf286dcb18c5ba9a1d71fe794e3ace493f340ba92890
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B73 9828 bytes
font_02_sfnt_off0000bd26.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD26 4324 bytes