Malicious PDF — malware analysis report

Static analysis result for SHA-256 4456a34383809eea…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 01:38:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 225e20691f8321d6491f0c358d218dc7 SHA-1: 28055c6db86653d8afa8bb462003ce3d3cda8e43 SHA-256: 4456a34383809eea8a5729c4d76c833761a95a1f48c902c98cc48904fd57e376
154 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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and a URL to a Shopify-hosted PDF. This suggests a social engineering attempt to drive traffic to malicious infrastructure, likely for malware distribution or phishing.

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=android+jetpack+example+java
    • http://pesexa.ppmra.website/uploads/1/3/1/3/131384201/1250481.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/beyond_the_bermuda_triangle_book.pdf
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/jokune.pdf
    • https://cdn.shopify.com/s/files/1/0435/7590/2363/files/kedapibefikutogin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/skill_acquisition_and_entrepreneurship_development_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0433/7818/0259/files/19577390147.pdf
    • https://cdn.shopify.com/s/files/1/0437/6952/8471/files/gofejavelisijusir.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7058/files/jewotadapabemorekafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/xizolepuvojezerabezojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5774/0957/files/78823609635.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6166/files/71975416390.pdf
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/85504929688.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_off00006910.bin
feba2467a22c2e4741d3e467342b5d76ffab7ba3f25edd255e2f2f5b8256545e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6910 5296 bytes
font_01_sfnt_off00007b05.bin
826fe63542328229f7946f0d81142a5e12a1be6864d8d2c487ed4ba5b3089cf8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 10420 bytes