Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1805ac89d891ede…

MALICIOUS

PDF

38.3 KB Created: 2020-08-17 14:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f098f99707b79a7545fb7f7635d749a SHA-1: b02564c5973f5f04f221a6e00cb62deed018ab83 SHA-256: d1805ac89d891ede41c6291f729c6855991689025c83f767041527cc76762a33
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests the document is designed as a link farm to distribute traffic to malicious sites, likely for phishing or malware delivery. 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.com/pify?keyword=net+ionic+equations+practice+problems+with+answers
    • http://telika.beholdinghimbecomingmissional.com/uploads/1/3/1/4/131453574/koginobejimulev_vuzegofomu_tadawogus_zexigigum.pdf
    • http://files.cohillway.com/uploads/1/3/2/6/132682342/kugos.pdf
    • http://vepoz.aitosaudio.com/uploads/1/3/1/4/131483453/67ee2c9b52b25.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/11662242332.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/38192667563.pdf
    • https://cdn.shopify.com/s/files/1/0451/9552/6295/files/13686248373.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/bejamixuxela.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2503/files/xilowedozusinonideru.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/whatsapp_gb_untuk_pc.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/24376703313.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/85622151503.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/zosaxebazot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/nuravusulufejet.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_off000057aa.bin
6d7f37f16bfd9b0d1a5a6d5c61a0baf0cea33263214874643df1e312bac0c497
pdf-font-stream PDF embedded font (sfnt) at offset 0x57AA 5500 bytes
font_01_sfnt_off00006a4a.bin
9dcdb167161132041a0ed715794fc57d074778a6236eceaf387c20a0b21657d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 9916 bytes