Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3a4e2e1f299040…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 21:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72a19d0890d223c572aeea3bc8111241 SHA-1: 3633d852ddf512d89556efd3cdca697619f6f65e SHA-256: 4d3a4e2e1f2990407d33914ee416a8f2a305dcb15fad8db413642517b539941c
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Bejeweled Blitz apk free' and the malicious URL. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely to manipulate search engine results or distribute further malicious content. The primary malicious IOC is the redirector URL.

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=bejeweled+blitz+apk+free
    • http://jinuzo.kristenmeeceart.com/uploads/1/3/0/7/130775162/c08fcd.pdf
    • http://files.guidetoamericasparks.com/uploads/1/3/1/4/131453156/1019bf882fe54.pdf
    • http://sogawaxe.emilyeaglin.com/uploads/1/3/1/8/131871899/sizutonuna.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/74769310170.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/risiketodaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/71110480851.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/44051830679.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8090/files/comment_couper_un_document_en_plusieurs.pdf
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/alta_costura_y_alta_cultura.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2523/files/law_and_order_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/83846309224.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/dusokigokowopafuw.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_off00005d82.bin
7188015eb1a8e6dacb4cb4569439c30ee55dbe125f0f4300c3667b7d4bbe8a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D82 5328 bytes
font_01_sfnt_off00006fd2.bin
a0f52be55a16aafae9e264e8dcad79e04348d93993f762af533ff0edcc81aa7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD2 9856 bytes

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