Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5c388adb3b81e5…

MALICIOUS

PDF

39.7 KB Created: 2020-08-05 08:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0012d412c5e358f6b9f3f95ba71c37c0 SHA-1: 4b41705a44f1bbf14200809bfab5a38a53bec1db SHA-256: 8e5c388adb3b81e563cf0d382ca62f20920dc9028a895c65604b272c6ef31dae
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.com/wb?keyword=jpg%20to%20pdf%20combine%20file%20online', is presented as a tool to combine JPG files into PDFs, likely as a lure. The document body, though heavily obfuscated, also contains this URL and other links pointing to Shopify, some of which are confirmed benign. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=jpg%20to%20pdf%20combine%20file%20online
    • http://files.fotosations.com/uploads/1/3/0/8/130814124/nunegurubek-lelexuromesed.pdf
    • http://files.dunedinhempcompany.com/uploads/1/3/0/8/130814411/555859.pdf
    • http://files.billymullaney.com/uploads/1/3/1/3/131380456/wigivenimoved.pdf
    • http://xozeb.perrysburgorchestras.org/uploads/1/3/1/3/131380042/117e8226c9af3e9.pdf
    • http://files.genuinepestcontrol.com/uploads/1/3/1/0/131070971/c8b1309.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/insertion_sort_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/kizamujoviwokezen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7291/3557/files/rojobozabimimisogezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9639/1323/files/gijavuxuzefinesinasujuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/21221975277.pdf
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/labidexofadivofaxadora.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/xewemapalumirodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/pidixutoniwimosoxobozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1996/files/pevumofezekulaneg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/11515375088.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/jingle_bells_lyrics_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/lanolekuxubigisamamugi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/final_fantasy_7_cue_file.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_off00005e84.bin
a0c022b2d0150fc66172fdb39c1a6966ee13c3e6991c1e76aac625da45068103
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 5120 bytes
font_01_sfnt_off00006fe7.bin
e45eced79edf2d9b232c39de94073721fe9094dbdef1d3d402cc1984b88f94f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE7 9908 bytes