Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a58f76ebd591b31…

MALICIOUS

PDF

54.1 KB Created: 2020-08-24 07:41:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f15c783685cf68021f3adb912cae873 SHA-1: 882dd368661e886ba734d5064448638fb3b8624f SHA-256: 9a58f76ebd591b31cf21e64887a961a753f9a62ba2ad5ade334049c1f82b0712
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=white+flannel+sheets+target'. This URL is presented within the document body, disguised as a lure for 'white flannel sheets'. The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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=white+flannel+sheets+target
    • http://vajeg.ksasteel.com/uploads/1/3/1/4/131406893/8015660.pdf
    • https://cdn.shopify.com/s/files/1/0435/1623/1840/files/xegukegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0533/6985/files/92550575688.pdf
    • https://cdn.shopify.com/s/files/1/0453/8574/4552/files/swift_data_structure_and_algorithms_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4675/4714/files/african_medicinal_plants_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0434/4938/5126/files/58141504808.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/watefozajiwotazadaval.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/39080467929.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/8519919125.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/77132404356.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/family_tree_maker_torrent.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_off000094f4.bin
90442887d3c97bb1356c2ec7ced6f76febb8eeab1964ba03a8993a8c0d7dd29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94F4 5040 bytes
font_01_sfnt_off0000a620.bin
12e62d739ca6a444085d98afe3c0aebdbd2f53059f209767a1ff24073c093ba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA620 11028 bytes

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