Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0c46aed38871d1…

MALICIOUS

PDF

49.2 KB Created: 2020-08-23 04:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 660e8a17118f838f9e5394fe66841481 SHA-1: 00557ec3902dd497997b3d1da1c4cb4f0cba22eb SHA-256: 4a0c46aed38871d1913cbd1ce25334de1a611bc8a1b038fb5a69d0d83942792c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to resume templates and includes the malicious URL. The PDF also exhibits characteristics of a PDF_SEO_LINK_FARM, with numerous external links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content widely. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious sites.

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=resume+templates+no+experience+high+school
    • http://wixat.missycosby.com/uploads/1/3/0/7/130739197/5682429.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/paboridafosavofadaji.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/biblical_hebrew_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5003/files/kafevifiradux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/38550479461.pdf
    • https://cdn.shopify.com/s/files/1/0440/8056/2326/files/definition_of_oral_communication_skills.pdf
    • https://cdn.shopify.com/s/files/1/0440/7800/6437/files/probability_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0451/3038/3514/files/fusionner_2_documents_creator.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/26470282687.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/88073216921.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/62390547991.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/silevifufuli.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007320.bin
3c8c6ba5c4483ba24f54928f5eb8ed98f77ade372cb6661f7fdaabce0d202be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7320 5304 bytes
font_01_sfnt_off00008500.bin
ae079ade5b9ec1df0592c24265b6dbc7367a45de647bef521a821fa9ef311554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8500 10744 bytes
font_02_sfnt_off0000a9ab.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9AB 4324 bytes

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