Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6400470881504cc…

MALICIOUS

PDF

34.1 KB Created: 2020-08-31 11:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea30ac2e0b4b73821381998f389ed138 SHA-1: 6bb39a5ed871b457a3dc696091f16ee25e4c60e8 SHA-256: a6400470881504cc1111dd66e6d8f252cda940874e4c4ccb534a3f2160c51ad9
154 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 used to funnel victims to a phishing or scam page. The document body contains garbled text but includes the URL and a keyword that suggests a lure. The presence of a large number of external PDF links, many pointing to static.usrfiles.com, indicates a link farm designed to improve search engine ranking for 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=i%2527coo+doll+stroller+canada
    • https://static.usrfiles.com/ugd/b8c837_a7c66bdfd47e45849508a83533fc6e57.pdf
    • https://static.usrfiles.com/ugd/162fe6_0954eacc41364cc4a5a0f2ed62e959f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc0a1e00c05c47cbb3a4919759a81a06.pdf
    • https://static.usrfiles.com/ugd/89363e_9b52a5da4c4044aa9a4fc721d5cbf755.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2201/files/wufepajezawoperaxovowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9566/files/renunciation_of_executor_form_nj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/11172983863.pdf
    • https://static.usrfiles.com/ugd/9eb187_3146988a962a48b0ab7f289ca4cd2f9f.pdf
    • https://static.usrfiles.com/ugd/f1780b_c021e49ddb3e483cb5fc62d6c294a727.pdf
    • https://static.usrfiles.com/ugd/9b33c5_bcdd0527c1784db993e1420fc63c79c3.pdf
    • https://static.usrfiles.com/ugd/2486b5_435d6d541dcf4bd598c90404047c897e.pdf
    • https://static.usrfiles.com/ugd/d162e3_b307ba372e2841f2ad34efd3a35da38b.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1590/files/64149664188.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6791/files/dibuxokadezure.pdf
    • https://cdn.shopify.com/s/files/1/0431/4346/3074/files/38037878573.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_off0000485d.bin
0434eaa65cd85288697b984bd19c85c464c4813ee1776bade7839d637e1666b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x485D 4904 bytes
font_01_sfnt_off0000590a.bin
a04ac1a2a2b63c42489de4c59554c5496cdab4b57506d0b7d8bd7f2beab84a8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x590A 10320 bytes