Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6517dede90b338…

MALICIOUS

PDF

45.4 KB Created: 2020-08-01 11:17:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea78045cdacf14f3c9d4f136de75275c SHA-1: aee9a1b5208763c77e235dd3051649699efcc905 SHA-256: 8b6517dede90b338d22fef7f481be0af827660c5463d8a5af9d08b222bcb050c
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL and text related to a video game, suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm strategy to improve search engine visibility 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.cc/pify?keyword=pokemon+fire+red+walk+through+walls
    • http://files.pietrogalizzi.com/uploads/1/3/0/8/130874627/kelovafuv_woragebetosemen_kigog_zawefa.pdf
    • http://files.braincarelaw.com/uploads/1/3/1/3/131380842/3170894.pdf
    • http://files.unathemermaid.com/uploads/1/3/0/7/130775528/4583744.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/30251171534.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18187133080.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/xabemefafus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5564/4823/files/xabalamupowiwikifitol.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/16046064308.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/lobiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/tugumedesobitixe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/83612281873.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/wodowekaporet.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/11669183451.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/14879198722.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063eb.bin
92d93e836d8b79914df598ffb58e13c958bf974cf897afc5dd093d9e4bd81466
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 5360 bytes
font_01_sfnt_off00007608.bin
cdba73d3804e21300e1c11fcdcc431da341d463ddbafb0d0c029a2b8159c0097
pdf-font-stream PDF embedded font (sfnt) at offset 0x7608 10676 bytes
font_02_sfnt_off00009a50.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A50 4324 bytes