Malicious PDF — malware analysis report

Static analysis result for SHA-256 c306e19ff4d6b44e…

MALICIOUS

PDF

32.9 KB Created: 2020-08-22 21:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246b3e52af55725240b714d34b5f33f8 SHA-1: 4f964eec4fee4e65749c17db0dced179d6be2687 SHA-256: c306e19ff4d6b44e45abcfd5ca15c6e9c817fc2f3000cb1578761f9ecf3ae292
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that appears to be a lure, and the file itself contains numerous embedded links, many pointing to Shopify domains which are likely used to host further malicious content. The primary malicious URL identified is https://ttraff.ru/pify?keyword=akela+hai+mr+khiladi+ringtone.

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=akela+hai+mr+khiladi+ringtone
    • http://wixew.patagoniaorchardsllc.com/uploads/1/3/1/4/131454165/d29e4b.pdf
    • http://files.jftm-fit.com/uploads/1/3/0/8/130873893/d03d8815f.pdf
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/2983005050.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/bupudisazokavelujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/allah_loves_me_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/26282293859.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/sekavoxoliw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/37178652205.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/gagov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/98999871210.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/pafos.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_off000045b2.bin
512036d6e363e273d3de56763d20c008195e2b43670cfba9441984b8f2574980
pdf-font-stream PDF embedded font (sfnt) at offset 0x45B2 5116 bytes
font_01_sfnt_off000056e6.bin
27e09c45931dbff0288b4299004a4fc43e207f55aa89b440b8697714e9349b73
pdf-font-stream PDF embedded font (sfnt) at offset 0x56E6 9396 bytes