Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3a5cd3fcfb232d…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 15:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 601ab8a1f740bd379ec31c159530a89a SHA-1: c21781a885c06419608fa4bbb5d2a4142d85fe1e SHA-256: 9d3a5cd3fcfb232defd1d9102e1b19ed537e3f94c99208213fe26d0664d26e58
120 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'frame relay tutorial pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further supports the malicious intent of directing users to external content.

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=frame+relay+tutorial+pdf
    • http://files.thecheekyfellow.com/uploads/1/3/1/3/131380625/9085819.pdf
    • http://wapet.noltextruss.com/uploads/1/3/1/3/131398008/xebebikukav.pdf
    • http://files.northstarchapter.org/uploads/1/3/2/6/132681885/1780449.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4065/files/verupazuzalomasokolite.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/lakorojitutofoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/xoxotadosixevizifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/41169403867.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/kiwetejusepovenudu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/jeep_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/behavioural_design_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0429/9273/0275/files/6069379026.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_off00005c27.bin
adfa2b4d60f81d2d202980a89b49e6fe7754ffd7c5a90933041c42a4e29c9d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C27 5068 bytes
font_01_sfnt_off00006d5d.bin
8ebba1fcda7130e17da80916843236b38b58809facce251f6ea71a5dcff1fd2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5D 10272 bytes

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