Malicious PDF — malware analysis report

Static analysis result for SHA-256 690cb1cb0660736e…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 23:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71c236adf351ddf3d40c19b3029d95e2 SHA-1: 3cae2f13add9bc4c05163fb2b8f08a7ca47b838f SHA-256: 690cb1cb0660736e558a7154db1be6056c5ee83e2bcb90bf514306241468b950
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links further indicates a link farm or SEO poisoning attempt to distribute 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=equestrian+stockholm+size+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cd79e3_10c32aa92edb44cf8bea2d89dd8ba1ee.pdf
    • https://static.usrfiles.com/ugd/2b25e8_ff37975f6fb94fe29f6bc5ab39f827c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_920ece2f56c643e299f179c7d6249eb3.pdf
    • https://static.usrfiles.com/ugd/91e123_6365827caa4c407f899e5cc65c12265d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8531fae6c78c472c9f3c122d4992102a.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_9b5589c7e6634db886f2b68ffbdf46c3.pdf
    • https://cdn.shopify.com/s/files/1/0435/9526/8264/files/73474135232.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/ctet_answer_key_december_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/voseset.pdf
    • https://cdn.shopify.com/s/files/1/0437/8096/4509/files/jazusutaburejupenopideki.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/nokuja.pdf
    • https://static.usrfiles.com/ugd/857e61_b3c5e02bcf354551b7e22f797897527d.pdf
    • https://static.usrfiles.com/ugd/41a0b6_1c48fdf2750949679f08dfcab5633206.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567b.bin
3e3e26cf446cf9fabe63b8bf0a9c8e3488031e7f8282a3a0530fba0a2d0fa26a
pdf-font-stream PDF embedded font (sfnt) at offset 0x567B 5552 bytes
font_01_sfnt_off00006935.bin
83d6d8165ab53f044890e5fefec5794a83f69d334deb7e77b23a634d6201b571
pdf-font-stream PDF embedded font (sfnt) at offset 0x6935 10128 bytes