Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bbf2d0c3f61881…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 19:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88660058b455824f57b8a1db550d2ecc SHA-1: 7394378139b062e66c6f40a3eaf0203a8799865d SHA-256: a3bbf2d0c3f6188167907a5e25f1b8dfdfb291a147a9a7534d5aff6d2b217e75
120 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, specifically pointing to 'https://ttraff.cc/pify?keyword=japan+travel+guide+january'. This link is presented within the document body, disguised as a travel guide, indicating a social engineering lure. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which are benign but serve to obscure the malicious intent. No scripts were extracted, but the primary attack vector appears to be directing the user to the malicious redirector.

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.cc/pify?keyword=japan+travel+guide+january
    • http://files.pilatesdonewright.com/uploads/1/3/1/3/131379730/2380171.pdf
    • http://files.brandsafarihunt.com/uploads/1/3/1/4/131410479/kabotex_pobek_revizufawixil_refanowoxijemid.pdf
    • http://files.meridianbodycare.com/uploads/1/3/2/7/132740633/pevotizani_nofoxi_zujufewoge.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0444/5500/2279/files/cursive_alphabet_a_to_z.pdf
    • https://cdn.shopify.com/s/files/1/0432/8865/8078/files/88230353835.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/aashto_lrfd_specifications.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/flow_cytometry_a_practical_approach.pdf
    • https://cdn.shopify.com/s/files/1/0432/5189/2381/files/55338050362.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/zolomike.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/useful_english_phrases_for_conversation.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/sybex_ccna_security_study_guide_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/sugafegobifukuxaregoseri.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_off00006519.bin
78be2d5eb339a94210273fa03828e07ae9d0ff96f57da1ba56e7033200868e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 5176 bytes
font_01_sfnt_off000076ce.bin
b65e50a9c17eda72faed36b9706236cfa921c542225f6ada5bdc8c374d591143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CE 10608 bytes

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