Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d5898107d7fbee…

MALICIOUS

PDF

91.8 KB Created: 2020-08-06 13:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a4144082c5ea3a5efaf39aaf4d3cb1d SHA-1: 04ed415ef1d865da6d9a097c974e3d78f6b25e35 SHA-256: 32d5898107d7fbee4fd736fd6cd9d9139067d0afa34d32e751c35f89940006b7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=physics+waves+quiz+pdf', suggesting a lure to a quiz to mask malicious redirection. The ML classifier strongly supports the malicious nature of this PDF.

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=physics+waves+quiz+pdf
    • http://monepuz.laketahoeyogaschool.com/uploads/1/3/0/7/130739625/b81b6750878bb.pdf
    • http://files.melissacharlesart.com/uploads/1/3/0/8/130873718/1ae0209.pdf
    • http://files.cachor.org/uploads/1/3/1/4/131406629/81587.pdf
    • http://files.paterpaulus.us/uploads/1/3/2/7/132711947/2377049.pdf
    • http://bafaben.guillozine.ca/uploads/1/3/1/3/131380429/vomuzomeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/78303604472.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/waximoganelipejufefumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/saxajigifurigevejudumus.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/galetarupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/68802952323.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/29831037895.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/vosipi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/mepib.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/2520489145.pdf
    • https://cdn.shopify.com/s/files/1/0428/3367/4396/files/63956824303.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunugituvalu.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_off0001148b.bin
f2499d49cff85450168b831507c7734feb8ac8f52d9555ce6139cae34f83b840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1148B 5548 bytes
font_01_sfnt_off00012792.bin
cb9a4dff90f9b0b0f98c4e09b7899cfd6ff8c3402c7521d9089f1bad5b078495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12792 11104 bytes
font_02_sfnt_off00014cf2.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF2 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.