Malicious PDF — malware analysis report

Static analysis result for SHA-256 8898a5737cef4e4a…

MALICIOUS

PDF

34.6 KB Created: 2020-09-01 01:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6c2aff9b057292f08d32748dbfe326a SHA-1: 19f37f81464bcbbf619375507120308437e37818 SHA-256: 8898a5737cef4e4a44c5af4fef42d35ec297e0e1b0c1f1dfd67b008b44320d33
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector (ttraff.com). This suggests a phishing or malware distribution attempt. The presence of numerous links, including to shopify.com, indicates a potential link farm or SEO poisoning tactic to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=modhubala+bagania+song+video
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56666804065.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/93156988409.pdf
    • https://cdn.shopify.com/s/files/1/0452/1954/5245/files/convert_webarchive_to_on_pc.pdf
    • https://cdn.shopify.com/s/files/1/0448/9897/5899/files/biology_book_for_neet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/zelda_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/adobe_scanner_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/13709173916.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0899/files/21002285089.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5333/files/asme_y14._5-_2009.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/megoxidojixugapilanaseg.pdf
    • https://static.usrfiles.com/ugd/dad90e_222acd46dbe840ba9491fd5273617dcd.pdf
    • https://static.usrfiles.com/ugd/ea78e0_e9fca65b6d754a6190d781cb81c686aa.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_off00003e81.bin
1e2b3640346c4ba75f4239807618f31378e3b1a33da1123265296247e5b07c9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x3E81 5000 bytes
font_01_sfnt_off00004f7a.bin
6e66c7db93695a5f7cd74fbeddc980db79cf1ee49869d9a1f7bf97942639de6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7A 9480 bytes
font_02_sfnt_off00006fef.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEF 4324 bytes