Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cd22f16f2a08d6…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 02:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017f2ce4dccc59c67a7d7b12d57e0926 SHA-1: aab6560fbda12ac1195840f4e61b2d88026d1c6d SHA-256: c6cd22f16f2a08d6a30bfff3b0ab95838eaf2bfc6ce1c659fb3afe528e214103
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a link farm. The embedded document body text, though heavily obfuscated, contains URLs that are part of this link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=android+chat+application+with+php+and+mysql, which is likely used to lure users to a malicious site.

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.ru/pify?keyword=android+chat+application+with+php+and+mysql
    • http://tikom.stevenmarkholliday.com/uploads/1/3/0/8/130814729/6436754.pdf
    • http://files.acadefenders.org/uploads/1/3/0/9/130969429/refoditafakulas.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/importance_of_beneficial_insects.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/acrylic_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0430/9696/5269/files/ap_polycet_previous_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/audio_device_on_high_definition_audio_bus.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6183/files/40652019388.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/axis_bank_atm_id_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/6513203233.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/venetiliwupokozimivixipek.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/gusepomotabedanipawi.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_off00006cf4.bin
d0afc7fb9975539164514786e81f4ea7771311b5f92dbfdeaf0bb6c5b906fb96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF4 5624 bytes
font_01_sfnt_off00007ff0.bin
022bdb5b8bc45d479d9d5d12ce4f389014965b51b7c6e285926dcc19480f44fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF0 10336 bytes

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