Malicious PDF — malware analysis report

Static analysis result for SHA-256 693c58c46edc3200…

MALICIOUS

PDF

49.2 KB Created: 2020-08-13 22:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e2ab5b02183704fd76efa3543ccfaf8 SHA-1: ef1caf3d344dc00689eeeead9632bfbffdfb0102 SHA-256: 693c58c46edc32003987a9a393629b9fb335a0e430d9f9f3cce64eeeff9110bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to potentially malicious infrastructure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. While the document body contains garbled text, the presence of embedded URLs and the heuristic firings strongly suggest a malicious intent to redirect users to external sites, likely for SEO spam or phishing purposes.

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=inlet+guide+vane+fan+curve
    • http://files.benjaminfavrat.com/uploads/1/3/1/1/131163610/2e1ee.pdf
    • http://files.jeffandpamterrell.com/uploads/1/3/1/3/131398250/gezuteme.pdf
    • http://depexolu.tah3.com/uploads/1/3/1/6/131636725/2532197.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/vesavikawesanolajubope.pdf
    • https://cdn.shopify.com/s/files/1/0429/4092/4063/files/anastasia_sokolova_nude.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6299/files/vuminiton.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/22073932249.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/sumevetubijutalezulo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9712/9109/files/gauge_to_mm_conversion_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/1796/9570/files/nokavaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/vasugaxexiviwov.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/bleckberry_world_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/15886943838.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/business_driven_pmo_success_stories.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084b4.bin
27ce27df1598fe266e7a72a1101933d4cf34cda0a99ce52b3e77bdc3f8bdb9f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x84B4 5008 bytes
font_01_sfnt_off000095d1.bin
38a35cd78b927aab1278d954c6ac8e536d13e9214793a58cb4d59622c944b211
pdf-font-stream PDF embedded font (sfnt) at offset 0x95D1 9928 bytes