Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca3e85acd4d9b5a…

MALICIOUS

PDF

44.2 KB Created: 2020-08-20 02:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5a3bae855a094f25e149977e2ef6b48 SHA-1: 395a34584114ca2fbada894a720cd071fcd26045 SHA-256: 4ca3e85acd4d9b5a6bf7e69be7c7e738b67b59eb8064f2150d5c00ebe70b2984
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=airlift+full+hd+movie++khatrimaza'. This URL is embedded within the document body, suggesting a lure for users to download content. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking the malicious redirector URL.

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=airlift+full+hd+movie++khatrimaza
    • http://duxegupap.techniquemma.com/uploads/1/3/2/6/132681072/9833221.pdf
    • http://files.donavitaeinteriors.com/uploads/1/3/1/3/131379312/vakizepolikov_bojolukoramolux.pdf
    • http://files.sunnysidehomedecor.com/uploads/1/3/1/4/131453198/tubuzowemozonegogol.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/lipujo.pdf
    • https://cdn.shopify.com/s/files/1/0447/9831/2609/files/vifunuviza.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/mudatevowexule.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0431/8029/4298/files/sociology_a_biographical_approach.pdf
    • https://cdn.shopify.com/s/files/1/0457/6808/1574/files/bookmark_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/moxivobafumurolobuxasune.pdf
    • https://cdn.shopify.com/s/files/1/0455/5482/7429/files/academic_writing_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/25182732085.pdf
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/846466214.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/96615542508.pdf
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/archie_comics_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/career_in_marketing.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_off00006117.bin
63b692593d583b361dbe49fba88d17b3b36c3ec84d71227f3a79928bf8b32dc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 4908 bytes
font_01_sfnt_off000071cb.bin
843af76e3c3d2eba1ce0b729b75360027070b43acc5ffd0113d0ce74ce122d43
pdf-font-stream PDF embedded font (sfnt) at offset 0x71CB 10492 bytes
font_02_sfnt_off000095a5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A5 4324 bytes