Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd7b7df1c3163db…

MALICIOUS

PDF

46.5 KB Created: 2020-08-04 07:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ab59ea692261182dec3b5387a9cfdc7 SHA-1: 36f0eb0324f7f7a00c1cb4c08f14db383cb6bf32 SHA-256: ccd7b7df1c3163dbc9c36bbec96cb16fcdc68ba8c79b51cfa751947f9f0a0675
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=download+pdf+adobe+reader+gratis', is designed to trick users into downloading a PDF reader. The file also contains a large number of embedded links, many hosted on shopify.com, suggesting a link farm or SEO poisoning tactic to distribute the malicious 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.ru/pify?keyword=download+pdf+adobe+reader+gratis
    • http://files.boafboutique.com/uploads/1/3/1/3/131384359/lipegekosu.pdf
    • http://files.belizesportsoutreach.com/uploads/1/3/2/7/132740250/958f3.pdf
    • http://sepuked.greenfielddevllc.org/uploads/1/3/2/8/132814989/1db2a.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/zodijikumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78108387577.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/68244243219.pdf
    • https://cdn.shopify.com/s/files/1/0446/2706/7043/files/kids_pixs_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/89828951502.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/95294394204.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/kipusofaxutaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/namutamolazenurepu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/carols_for_choirs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/46630431030.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/28530698515.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7992/files/53846328008.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/young_buck_straight_outta_cashville.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007744.bin
4defcf7e857ab00a539179e10f4b8e40148c436faa7964a861345877bc288ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7744 5440 bytes
font_01_sfnt_off000089e6.bin
8c5c730adbe5eb72b2582fc42bb9b0483c087d2a52ccc32ccce46099220a28ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E6 10192 bytes

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