Malicious PDF — malware analysis report

Static analysis result for SHA-256 33682b99e16aa20a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-12 01:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8154f4bdba20ba3007317aafdcecd84c SHA-1: 7fa9d14561c86ebb8c5e356e5148f1efba00b8e8 SHA-256: 33682b99e16aa20a669e817ed7b9ac2bf727a73b4a8cca85e92bc1fb5402e5d2
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, a technique often used to create SEO link farms or redirect users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=java+programming+for+selenium+pdf'. The document body itself is heavily obfuscated and contains what appears to be a reconstructed URL, further supporting the malicious intent. No scripts were extracted from this sample.

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=java+programming+for+selenium+pdf
    • http://files.rulingimagination.com/uploads/1/3/1/4/131406369/5101391.pdf
    • http://files.wishawebenezergospelhall.org/uploads/1/3/1/1/131163712/2688346.pdf
    • http://tuxali.bblifeinsurance.com/uploads/1/3/0/8/130874365/nemutojew.pdf
    • http://files.rockymountainprospectors.com/uploads/1/3/1/1/131163898/nugatazagokukiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/jegizemuwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7145/files/fiwezanetota.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2186/files/fitewusunajiruku.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/xuwawasujemurapanafudes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/scjp_core_java_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/fadawobigajopijukejage.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1871/files/15836579125.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2168/files/95264232521.pdf
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/poterek.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/92089145706.pdf
    • https://cdn.shopify.com/s/files/1/0428/3619/7542/files/5067694730.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/concepto_de_equidad_e_igualdad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/66332560660.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_off00006826.bin
f1d1c88d50e0b8db894060f83596b1d0e69c70736a7c718b85b33098776ae9a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6826 5412 bytes
font_01_sfnt_off00007a79.bin
60533e27b7fd7a8de9d30e02863e7c94dbd05334e785d6f788fce897d999bc3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A79 10588 bytes