Malicious PDF — malware analysis report

Static analysis result for SHA-256 5584b28e3b6cab7b…

MALICIOUS

PDF

43.6 KB Created: 2020-07-24 23:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9884b067a8b0effecbef888054bdcf44 SHA-1: 90958effd086d05a31cb5a00514ddf73ac993dfa SHA-256: 5584b28e3b6cab7be4c3a13e1b2df4cae7f33e6898e23e8b033b38d662c880cc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and includes a keyword related to dictionaries, which serves as a lure. The primary attack vector appears to be directing users to malicious infrastructure via the 'ttraff.com' URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=english+to+spanish+dictionary+with+pronunciation+pdf
    • http://files.sisterspiritwomensharingspirituality.org/uploads/1/3/2/8/132815154/58853863.pdf
    • http://files.boonieandco.com.au/uploads/1/3/1/4/131409017/bosuxuzoxe_zafezosuse_rulezowoduta.pdf
    • http://files.lakelurelabradoodles.com/uploads/1/3/1/3/131378999/fexod_fuvemiselabaze.pdf
    • http://files.flatspokecycles.com/uploads/1/3/1/4/131408529/6549756.pdf
    • http://files.boonieandco.com.au/uploads/1/3/1/4/131409017/bosuxuzoxe_zafezosuse_rulezowoduta.p
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/10258671201.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/73327209757.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3388/files/tuxosofokaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
    • https://cdn.shopify.com/s/files/1/0431/1302/1607/files/mivofagudagiparulaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3485/4051/files/kapulaloje.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/baputomir.pdf
    • https://cdn.shopify.com/s/files/1/0438/2559/4530/files/1286890224.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0813/files/31307520022.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/vokevetupek.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/zukidakaworixixawevas.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_off00006e02.bin
e9521524a87ff30583cb0295e9f732aad608b6f23c585791a195944bf5a8a0df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5332 bytes
font_01_sfnt_off00008028.bin
0f8a4ed32cf290a7368e7126713b79cbbd6818f4f55d351e1466fb405ce792cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 9680 bytes