Malicious PDF — malware analysis report

Static analysis result for SHA-256 54aa8c6015179e0a…

MALICIOUS

PDF

39.9 KB Created: 2020-08-04 06:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7b96fe5ac2e212b03e9bf4983664374 SHA-1: 89a44f7967a6a57f8b7aa61237e288f09cd3fbda SHA-256: 54aa8c6015179e0a7961e039bf54d81f9adbf8d6b05ed20d04a40877807c1011
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=present+tense+past+tense+future+tense+examples+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious nature of this PDF.

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=present+tense+past+tense+future+tense+examples+pdf
    • http://files.rollsroyceweddingcarsuk.com/uploads/1/3/2/6/132681586/selopegazituw.pdf
    • http://files.daniellefodor.com/uploads/1/3/0/9/130969386/701178.pdf
    • http://files.landryserengeti.com/uploads/1/3/2/7/132740362/a446a.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/14673662291.pdf
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/simizubusexox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/9487861462.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/75882970903.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/31102117438.pdf
    • https://cdn.shopify.com/s/files/1/0427/9903/8631/files/22255803403.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/85482682732.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/biribexobibesinewobikox.pdf
    • https://cdn.shopify.com/s/files/1/0434/6583/4658/files/kekegoxel.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/96154601201.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/momumojelagaxofuses.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_off00005e77.bin
f53c0d2b837669587dba2d7c34086d14b76cf3a0905ade6ddfe7fa33f59d5a6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E77 5256 bytes
font_01_sfnt_off0000704b.bin
385db28e3bb0fe0d65f96e2217b4d7bd91823354d416ae0d395291cb983b0e75
pdf-font-stream PDF embedded font (sfnt) at offset 0x704B 10040 bytes