Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9a2ddfc9a1a623…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 07:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 748dc128df323aecf869432eeb1e62a7 SHA-1: f9a34f6f1d286c08399b898912449b1d840cd594 SHA-256: ec9a2ddfc9a1a623ebcd40db94c57bd7732096e8182805d15f344c99dc773a87
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.ru. The document body, though heavily obfuscated, contains text related to a 'free a4 jigsaw puzzle template' and includes the same malicious URL. This suggests the document is designed to trick users into clicking the link, likely leading to a malicious site or further malware download.

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=free+a4+jigsaw+puzzle+template
    • http://gujavifaf.palmettoswing.org/uploads/1/3/1/4/131453574/1185553.pdf
    • http://files.lesswhoamoreyeah.com/uploads/1/3/2/6/132696558/bajaxuzedam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/81840042084.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/dna_hybridization_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/3610956047.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/beramojejop.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/22552987853.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/38059018275.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/lezed.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/28915650501.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/alchymista_kniha.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/22555381263.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/destiny_2_690_boost.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/68200816397.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/fazur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.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_off00006380.bin
faecd9b7db90a305fe00fef0375d4619cc509c22014a84d6cad43370acb6ab06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 5400 bytes
font_01_sfnt_off000075f4.bin
d34d753fa469732979514f724905aa989ef29b24628c1b6cbcb4f0877d988f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 10532 bytes

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