Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8adb38ca602135…

MALICIOUS

PDF

43.5 KB Created: 2020-08-30 04:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b81a3e805e66161c2c6aaddbb7e5bf6 SHA-1: a6cabd380520a19ca98fc0d4da085abaf939711e SHA-256: 1c8adb38ca602135d06e12f7f5b2175b1a7dc473209d149d40f98fb0b845b38a
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, pointing to 'https://ttraff.ru/wix?keyword=humans+humping+each+other'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body contains the same explicit phrase found in the URL, suggesting a lure to a malicious site. No scripts were extracted, and the family is unknown.

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/wix?keyword=humans+humping+each+other
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/pabimivanod.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/uc_mini_browser_apk_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/29104074110.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/gudabudufopugipotopotob.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/kemono_friends_dub.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/55052107225.pdf
    • https://cdn.shopify.com/s/files/1/0440/2118/6718/files/genetic_algorithm_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7630/5564/files/74874798682.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/16411692770.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1235/files/28501174234.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/banitifobavilolemubif.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/keresaselojab.pdf
    • https://static.usrfiles.com/ugd/b8c837_b8333e51fbd040d286aa09d763f6a548.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_8c76e82abdb9460aa1927576b05a719a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9d61f3c877047819d0cc5945c95a88d.pdf
    • https://static.usrfiles.com/ugd/1c90dc_693240c61e354162a08f2080e20a65a7.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_775416881a6542cf9d42530e75fb9475.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_off00006ade.bin
44ae2a9f9ab3aa0a0b6d5602ea3b64c004e206bed479df2d47deb6b8857275a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADE 5276 bytes
font_01_sfnt_off00007c99.bin
02545f86c3d044ddc4162c98bbad344b70000f388102ffa8cc80fe8880aeddac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C99 11392 bytes

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