Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ae0158b6999dca…

MALICIOUS

PDF

46.6 KB Created: 2020-08-31 12:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da155791834cb13274d655094ae0cb4b SHA-1: d691a7492d374eea32cfcc50a2f8e7bf3cd6dd88 SHA-256: 53ae0158b6999dca1c125248c446490365d2501a0d202e39d18bdafa5714b514
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used in SEO link farms. One critical heuristic identified a link to a known malicious redirector at https://ttraff.ru/wix?keyword=ten+thousand+paths+to+becoming+a+god. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting the primary goal is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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.ru/wix?keyword=ten+thousand+paths+to+becoming+a+god
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/66474392839.pdf
    • https://cdn.shopify.com/s/files/1/0434/6334/4280/files/saragepebul.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/dynamics_365_user_report.pdf
    • https://static.usrfiles.com/ugd/7baf93_c59732619cab4d558d5f9ca3342cca9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c60409515f1431898c3ca459170e341.pdf
    • https://static.usrfiles.com/ugd/e6092c_6558b56dc1504fc4a58f0c1dda30980d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96056065099.pdf
    • https://cdn.shopify.com/s/files/1/0436/9760/2713/files/99711714978.pdf
    • https://static.usrfiles.com/ugd/12745a_04173d1355374256bcbda0ec66f54b54.pdf
    • https://static.usrfiles.com/ugd/b8c837_db36a262cf0345a29e1921386e480fe3.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005438.bin
55f194be5d22cc552714f630acd5cdadfc713929553947c1facd824cc384b75b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5438 3932 bytes
font_01_sfnt_off00006220.bin
0ceb4d667dadcd48738564e63e217724bdfbb8616b16c2de133b675f4ed1cda3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 5448 bytes
font_02_sfnt_off0000747c.bin
674ee85af9271dd0f5158b793bf2e88d9d40539c9b16013ff5d83d292dd5f553
pdf-font-stream PDF embedded font (sfnt) at offset 0x747C 10368 bytes
font_03_sfnt_off0000983a.bin
3ab51a0190a2f6af35d71698c45810bf0c2394ef17cd5a06b1f2a19523a5b55b
pdf-font-stream PDF embedded font (sfnt) at offset 0x983A 16172 bytes