Malicious PDF — malware analysis report

Static analysis result for SHA-256 99780858c453ce99…

MALICIOUS

PDF

42.0 KB Created: 2020-08-30 22:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5168ca5bba61d9b791a7868924497304 SHA-1: f3644ad9d351edea4686a6c41623971302a7898e SHA-256: 99780858c453ce99daf128b09c5721edb9548853e88a2b7173be94e54d2b1df8
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a free manual. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm used for SEO manipulation or distributing malicious content. The document body, though heavily corrupted, contains text related to 'Manual de refrigeracion industrial gratis' and the wkhtmltopdf application, aligning with the lure. No scripts were extracted from this sample.

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.me/wix?keyword=manual+de+refrigeracion+industrial+gratis
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/82468213999.pdf
    • https://cdn.shopify.com/s/files/1/0437/0179/7019/files/google_analytics_certification_2019_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/photoshop_cs6_camera_raw_filter.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8037/files/bizerba_uk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/barisan_dan_deret_smp.pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/21736396909.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0928/files/esma_aifmd_reporting_technical_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0463/0960/5541/files/37458736566.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/21561415095.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/vixokuxolivimona.pdf
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/43110984175.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/nipetitesana.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/54873859854.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/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006534.bin
851366f73b972687c5b7e2e4a946e1a2265160ed908000d7146a1e6c6740f17a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6534 5196 bytes
font_01_sfnt_off000076ec.bin
95da406efffd236d31236dc29e141da5d7420174a9d95b02b590a41d42910b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 10524 bytes

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