Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6e58490cc69bac…

MALICIOUS

PDF

45.0 KB Created: 2020-08-05 10:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59bc853310df57d1836f6ddc94978dfa SHA-1: 4737826871e8daddc32e0580efacb0fef4bc172f SHA-256: 1a6e58490cc69bac49f4f28dd907ac15ac2a5918e6875fbeb5fb2fd3a18f7773
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially corrupted, contains text suggesting a utility for merging PDF files, likely a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to malicious sites via these embedded links.

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/pify?keyword=r%25C3%25A9unir+2+fichiers+pdf+en+un+seul
    • http://files.ires-8.com/uploads/1/3/1/3/131379510/wibuxukam.pdf
    • http://files.solomonfinancialresources.com/uploads/1/3/1/1/131164260/nuwof.pdf
    • http://files.studentfinanceboard.com/uploads/1/3/0/8/130874612/xovexod_jedebanel_sularuxipi_sowiboju.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/85925036095.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/princes_of_the_apocalypse_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/83208117396.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.pdf
    • https://cdn.shopify.com/s/files/1/0430/9460/5975/files/disuzabezenenusuxelepukej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/xanumajusejupojigif.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/12928208779.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/79708757423.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/zegavokajizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/72151163380.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/20000_most_common_english_words.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mobisibat.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_off00006eda.bin
0fbcd57671eaa59c1a59934d83a927439bebb447af09f46ce62c447f3234aeae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDA 5316 bytes
font_01_sfnt_off000080b3.bin
c4fcd80d9a82530f5ad116dd57a3ff442e72b2d240c3d8adae51c8cbed433756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B3 11668 bytes

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