Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ffccf988fd05c0…

MALICIOUS

PDF

43.7 KB Created: 2020-08-20 13:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ceae6f6bc57f5709c66fa363a172353 SHA-1: 3a050eb2f89c77a85ba90e4992e2f49da0fffcd8 SHA-256: d4ffccf988fd05c02deb80479ec2c19e838025fae65e2908e644b24b7a166909
160 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links redirects to a known malicious redirector infrastructure at 'ttraff.ru'. The presence of a visible LOLBin command execution instruction suggests the document is designed to execute arbitrary code or commands upon interaction. The primary malicious activity observed is the redirection to malicious infrastructure via embedded links.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=acdsee+mac+os+x+free
    • http://files.museumofsocialjustice.org/uploads/1/3/1/3/131380337/minuwuvexi_boxivos_sokovon_rapasajaxefif.pdf
    • http://files.illinoisclimbingclub.com/uploads/1/3/0/7/130740444/48fc444a69.pdf
    • http://files.primitivenoiseband.com/uploads/1/3/1/3/131398573/xejamoruzir.pdf
    • http://files.nicolettelynch.com/uploads/1/3/1/3/131379743/5030429.pdf
    • http://files.weareallprettystupid.com/uploads/1/3/0/7/130775063/20cec07b2c0ce46.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/dopukozolofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2873/files/15804129347.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/boeing_ethical_business_conduct_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0464/8747/0248/files/75250086922.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/curl_set_header.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/38347044088.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/72445681753.pdf
    • https://cdn.shopify.com/s/files/1/0429/1765/8780/files/robbery_bob_3_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1158/files/kitusu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/43349260040.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/nagujakixilimub.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_off00006c52.bin
6f4d7a8a425f54b1d78a2932fc5675a70e9abdbb2ff68f001722386bc82fdb07
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C52 5192 bytes
font_01_sfnt_off00007de1.bin
4ef2c4ecd36894995a528649f3ce8354eba442a73f20ad8cfa9184eefcbb9e3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 10528 bytes