Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98c7433d22eecd9…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 07:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff79988ceebc86339a55012ed0cbd69f SHA-1: ed3a985a50ae5d37153072cd7718c7a0c896cf90 SHA-256: c98c7433d22eecd90e63f9dbfb8f5890354b5c140a8e44e3b648f107269dc651
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of an SEO poisoning or link farm attack. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/wix?keyword=dd+boost+for+sql'. The document body, though heavily corrupted, contains fragments of this URL and related text, suggesting the primary goal is to redirect users to 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.cc/wix?keyword=dd+boost+for+sql
    • https://cdn.shopify.com/s/files/1/0431/5778/2694/files/dikag.pdf
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/xeropijumovox.pdf
    • https://cdn.shopify.com/s/files/1/0435/8560/1695/files/fezukurerosezab.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/96800005877.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7239/files/zusopewivero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/ginonobifijewaloxobu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/bitimatif.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/61552749409.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd5c1e5383ec4a6cb593011b71e4da39.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_7f7fe431dae8406bb4d6baf99e680264.pdf
    • https://static.usrfiles.com/ugd/bfbc46_7790cae0addd418b82ed2fd50f304b67.pdf
    • https://static.usrfiles.com/ugd/086daf_d47b9b46d44f4506a864b65d438891f2.pdf
    • https://static.usrfiles.com/ugd/fa6f14_0ded9cfdd9b44071955217fa0194c157.pdf
    • https://static.usrfiles.com/ugd/b42fd6_cc42919ced2d452cb7dae719c0d7b397.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_off000058c4.bin
1967c1fd18874ccfe16fdc0eb321bab92a00866e1c395df440383da73322aa08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C4 4472 bytes
font_01_sfnt_off000067fa.bin
9b2c31922b876bb510ebb704cd60257c60681dc8db9054f25a975d1de9fcf249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67FA 10352 bytes
font_02_sfnt_off00008b54.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B54 4324 bytes

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