Malicious PDF — malware analysis report

Static analysis result for SHA-256 4699bef1b78cb124…

MALICIOUS

PDF

47.1 KB Created: 2020-08-16 00:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e6f097b7d7ffe37100e28c3344afd7 SHA-1: 7c1872fd807cfaa22dc4c068a20bf2a074a0d36a SHA-256: 4699bef1b78cb12438d50ade7ffe900bb765b17104065f56f15719ad5d0bc42f
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.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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=formule+de+sulfite+de+potassium
    • http://xubojep.atticplayers.com/uploads/1/3/1/0/131070161/nipoj.pdf
    • http://files.yorkvet.net/uploads/1/3/1/6/131606866/bilami.pdf
    • http://files.scarlettedwards.com/uploads/1/3/0/9/130969986/vibowi.pdf
    • http://files.bohoandbloomprophire.com/uploads/1/3/0/7/130775331/c0f63868fc1.pdf
    • https://cdn.shopify.com/s/files/1/0435/5869/9171/files/16262909506.pdf
    • https://cdn.shopify.com/s/files/1/0450/0901/0852/files/medical_terminology_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2392/files/48978253370.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/tiriladibuji.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/jojofavurebugokaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/49156902105.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/92091234062.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/tesugeju.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/38654878522.pdf
    • https://cdn.shopify.com/s/files/1/0435/8481/5259/files/bhu_b._com_entrance_exam_syllabus_2020.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_off0000696f.bin
7dba61da6910bac47b28c9e2a91403ded9bf723ee9f1e35ed41ff4b1e3faca91
pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 5144 bytes
font_01_sfnt_off00007ad8.bin
be001c3b2da14051950ee97cb88f1bf4246b665b910c0910a120c85260dbcbf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD8 16564 bytes