Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dcbc4374f6e9e3…

MALICIOUS

PDF

56.0 KB Created: 2020-07-31 11:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8acd8a7f8041166e43bf956e0901c47 SHA-1: cb17410e3c1b182676b7f543435f51ada8e3b665 SHA-256: 95dcbc4374f6e9e3b091478015354e9d4343ffea100b3bbf6aac9b2d93735ba3
152 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.ru. This URL is designed to lure users into clicking by using keywords like 'navodaya application form pdf 2020 19'. The document also contains a high number of embedded links, many hosted on Shopify, which is characteristic of SEO link farm abuse. No scripts were extracted from this sample.

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.ru/pify?keyword=navodaya+application+form+pdf+2020+19
    • http://files.sampsongigharbortherapy.com/uploads/1/3/1/6/131637257/9f3a166e32297aa.pdf
    • http://files.maskcarabeautycolormatchgina.com/uploads/1/3/1/3/131380845/noxonajaxel.pdf
    • http://files.kimallory.com/uploads/1/3/1/3/131379730/kasawasujidama.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/82364878034.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/74522204614.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/wukareguxaxenowegetiwobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/dabiviwivuvazaxidimidifi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/rekazidujagizumatawixiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/jutobewemafubila.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/89291786708.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/83515299028.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/kukirasevidemozos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1914/9216/files/20984550756.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/
    • https://cdn.shopify.com/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e25.bin
9b6693eca43fbcc8940480849a364fbfe880a07fca7b65e70e60db5daf4cd640
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E25 5404 bytes
font_01_sfnt_off0000a080.bin
78c30ab6aac324df292395c99bb2536eebc8eaee89b003c32c9828b55a2d0228
pdf-font-stream PDF embedded font (sfnt) at offset 0xA080 10376 bytes
font_02_sfnt_off0000c43b.bin
d40d4ae426710e291dabd5697d91ac7aef4a0031a2e18678e252a5eb83cb6a15
pdf-font-stream PDF embedded font (sfnt) at offset 0xC43B 3744 bytes