Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d568d9e9e89c79…

MALICIOUS

PDF

39.9 KB Created: 2020-08-09 21:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 509bea994840a8d23c7b853c665753aa SHA-1: df126defb82e9cfb85e198b756f9efbfbbcd986a SHA-256: 43d568d9e9e89c79df6faf9a70b2ce987c8506c089a46beb0714ac636e43984e
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting a phishing or scam attempt. The document body, though partially corrupted, contains text related to 'Accruals concept pdf' and includes the malicious URL, reinforcing the lure. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=accruals+concept+pdf
    • http://files.toffears.com/uploads/1/3/1/6/131637529/8854313.pdf
    • http://files.parkroadbaptistcdc.org/uploads/1/3/1/6/131606222/1257947.pdf
    • http://files.bessastadir.is/uploads/1/3/2/7/132711947/pimugiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/2460422620.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/71773109771.pdf
    • https://cdn.shopify.com/s/files/1/0433/8407/8503/files/d_d_3._5_ultimate_character_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0449/0782/3259/files/numifepupaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/nijofazato.pdf
    • https://cdn.shopify.com/s/files/1/0432/0981/8280/files/xojamapob.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/learning_russian_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/32943545436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69696378660.pdf
    • https://cdn.shopify.com/s/files/1/0432/2829/9428/files/88215088881.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/16251212202.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6584/files/kasunofibuwobupubosin.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_off00005fd7.bin
855b56060aabe67e7e1436a6e4458ffa92b963ac15967738a7fb7504b232b090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 5140 bytes
font_01_sfnt_off00007163.bin
25f26ab9e84094fa1d5a942bfb7e1bce58c3e69431e0791bf1db94ef77cce562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7163 9872 bytes

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