Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2912de3140ec41…

MALICIOUS

PDF

60.9 KB Created: 2020-09-01 21:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2845962d6c9c74bf6d7c0d28118cf1bd SHA-1: 724e2ef63445ad56ad2c49c4a0512514f1037662 SHA-256: fc2912de3140ec4140c11115a25c9e1de84f56b978c51e5bbfe4a783dc941aa8
154 Risk Score

Malware Insights

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

The PDF contains a clear lure, 'Click on detroit traffic report', and a critical heuristic firing indicates it's a malicious redirector link pointing to 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The document body contains the malicious URL and a link farm of other PDFs hosted on Shopify, suggesting a potential distribution or redirection mechanism.

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=click+on+detroit+traffic+report
    • https://cdn.shopify.com/s/files/1/0464/6866/1400/files/aov_taiwan_apk_obb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1746/9080/files/22328113550.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/xopusigiromulom.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/25053811912.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84712881745.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0225/files/blank_world_map_with_latitude_and_longitude.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/35264853353.pdf
    • https://cdn.shopify.com/s/files/1/0460/3284/7012/files/36050640187.pdf
    • https://cdn.shopify.com/s/files/1/0433/4397/0463/files/tulazakuzitiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/57699448013.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf3e10c080e9492e8cd5ef00654012a3.pdf
    • https://static.usrfiles.com/ugd/dc98cc_75acf69fbfc64eb88c4e24431a626404.pdf
    • https://cdn.shopify.com/s/files/1/0428/1368/5927/files/37214713254.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/4130033806.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_off0000b36d.bin
1b368bf05605412aa59713e6ec31de8713ef02afd979dbab8b09c1a33848a328
pdf-font-stream PDF embedded font (sfnt) at offset 0xB36D 4940 bytes
font_01_sfnt_off0000c449.bin
8bfb6a8b3c3ef18536bd66a56ad637dbfd5ae521d5845752cf223a32af68ee27
pdf-font-stream PDF embedded font (sfnt) at offset 0xC449 10024 bytes