Malicious PDF — malware analysis report

Static analysis result for SHA-256 576a6fa4ac5a57b6…

MALICIOUS

PDF

34.7 KB Created: 2020-08-31 05:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ec2d1503508439968107ea1e8a1f83 SHA-1: 6f31214fc116c5b10b00208b75b107cabd298dc1 SHA-256: 576a6fa4ac5a57b63abf237c9c944c9903460022d7759692fdb07c775cc4a0f5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to a book title, suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to a malicious site, likely for phishing or to serve further malware.

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/wix?keyword=the+american+pageant+ap+edition+updated+16th+edition
    • https://static.usrfiles.com/ugd/0d089b_8cdc0a59598d4f199a68cd7f7cc29d6f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7abb618046a4f458bb58e871afd2125.pdf
    • https://static.usrfiles.com/ugd/b8c837_18d64eb0bd2d429ab5170932bdc9e79c.pdf
    • https://static.usrfiles.com/ugd/8b97dd_a26710b7473946f6a05db6787e9b5ae2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/folamukizuduxe.pdf
    • https://cdn.shopify.com/s/files/1/0448/1875/9842/files/wojobavexun.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/4909999792.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/fedubufugixejin.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/natawunigewin.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/behavioral_neuroscience_8th_edition_breedlove.pdf
    • https://static.usrfiles.com/ugd/b8c837_acdbb6ff422f4e5e854f4982dd587dd7.pdf
    • https://static.usrfiles.com/ugd/756799_122811b8139544fd9f1f25c94719cdcd.pdf
    • https://static.usrfiles.com/ugd/4dd980_bea23464112d406d8f888ec689fe2f63.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a46d5b8ab294e7a97e3382c3e3bb177.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_off000049d8.bin
4ea41704ffc7dddea86bd301c204f1ee05480192abe53ecff27b5d98c42c972a
pdf-font-stream PDF embedded font (sfnt) at offset 0x49D8 5432 bytes
font_01_sfnt_off00005c2e.bin
e50fe7394c753c63790d3b3cb7813a70764355c5ca607e2a582bf311c13da545
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 9740 bytes