Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3fae3bc751bb3a…

MALICIOUS

PDF

47.1 KB Created: 2020-08-08 19:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43702b839bda0b5a9ec5860b52f4e04e SHA-1: 003611e044eb47074063627c4f10c58aabd145f1 SHA-256: 4c3fae3bc751bb3a5afbc5b0e67b223e5b60322aac99c7e6a66f2874b39fc2ba
120 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 'https://ttraff.ru/pify?keyword=alimentacion+saludable+libros+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The document body, though heavily obfuscated, contains references to the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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=alimentacion+saludable+libros+pdf
    • http://ninona.sequoiavalley.com/uploads/1/3/1/4/131407227/kikijade.pdf
    • http://files.hamptonshousewife.com/uploads/1/3/0/9/130969740/duzukozape.pdf
    • http://files.ask-noodles.com/uploads/1/3/0/7/130740367/novexogule_dukagepuwalis.pdf
    • http://files.grandmaceilshouse.com/uploads/1/3/1/4/131408529/92347f03614c5.pdf
    • http://files.balqeesline.com/uploads/1/3/1/4/131409761/buviroremog_gejabanipuzofav.pdf
    • https://cdn.shopify.com/s/files/1/0445/6490/6148/files/maths_formulas_for_class_6_to_8.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3603/files/pexaj.pdf
    • https://cdn.shopify.com/s/files/1/0439/2920/6939/files/94552515706.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/925341402.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/mupakogarelolatubevi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/narrative_paragraph_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/anemia_aplsica_idioptica.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/open_in_adobe_reader_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/safepi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/33359452495.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/93931312115.pdf
    • https://cdn.shopify.com/s/files/1/0430/4879/6309/files/dotab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/8325886924.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_off00006957.bin
425fd42318d12c95e7fabeab40b595e9776dcfb68d177f8f5b2c37d317b1b63a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5312 bytes
font_01_sfnt_off00007b30.bin
690a078ecac24e6333bb024eb8f46d2190d8cd46979bcdcd83fa0d0aee415655
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B30 11008 bytes
font_02_sfnt_off00009ee5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE5 4324 bytes