Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cdf866d9287ed7a…

MALICIOUS

PDF

47.7 KB Created: 2020-08-22 23:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cea853b70f5151b8de312d85771a46df SHA-1: 5b5a7776b470941953e8008f17b06c337529b1ef SHA-256: 4cdf866d9287ed7acf6f0fb09e17454dc059e8a5a52be2461904460fd6597080
152 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 likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and references a 'guide', suggesting a lure. The presence of numerous Shopify-hosted PDF links further indicates a link farm designed to obscure the ultimate destination.

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=dwarf+wow+classic+guide
    • http://zarefasa.psurochester.com/uploads/1/3/1/4/131407995/5d00e43cc.pdf
    • http://files.cincyfirstladiesforhealth.org/uploads/1/3/1/4/131437515/2907859.pdf
    • http://zixawika.rockmybling.com/uploads/1/3/1/8/131857315/lajuzobesadukogaj.pdf
    • https://cdn.shopify.com/s/files/1/0440/1112/6942/files/bonurevuzetorinikixud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/duzorijim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7149/5574/files/95466924883.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/sonolupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/zesoput.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3749/files/67264734930.pdf
    • https://cdn.shopify.com/s/files/1/0445/5740/2276/files/lubavuzapasoxumoti.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/23777191982.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/bulewofakeketosasidisale.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/27585424935.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/guidewire_claimcenter_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/talimomakudi.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_off00007d6f.bin
066bdc523e338c8442c090f03787418249bb6b81675b00789f69cee6777c84c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6F 5280 bytes
font_01_sfnt_off00008f81.bin
2a2404103c60d5a379ede4968628fc5d37bd5f654d8c1bcc31bb0c127390f5f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F81 9968 bytes