Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b704e96f125431d…

MALICIOUS

PDF

53.6 KB Created: 2020-08-15 03:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f53306226ff9f362287975feb97afe3 SHA-1: b36350afcda4f5284575d70807e12ff578b830ea SHA-256: 9b704e96f125431de7497c23f4fd5079d9fd6eeafbb048b7296f50f968b2e254
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, suggesting the document is part of a link farm. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a malicious site. The document body appears to be heavily obfuscated or corrupted, but contains the malicious 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.cc/wb?keyword=kornit%20avalanche%20hd6%20manual
    • http://files.leopardpineapple.com/uploads/1/3/0/8/130873945/2309324059d36.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/biomass_energy_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/3170/8316/files/xotavukopejalopezi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/blue_book_of_grammar_and_punctuation.pdf
    • https://cdn.shopify.com/s/files/1/0448/0063/9133/files/aneurisma_de_aorta.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/kidusiposenisamu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/57722734982.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/857188694.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0835/files/boxer_shorts_sewing_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0436/2013/9170/files/mazda_cx_9_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/7978/4866/files/83289300565.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/ladegegaxo.pdf
    • https://cdn.shopify.com/s/files/1/0447/7665/2949/files/20635902975.pdf
    • https://cdn.shopify.com/s/files/1/0433/8761/7447/files/gozinorasi.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_off000092c9.bin
51e416e9efb1e82fe10af533eef48cce31896c33793da51f8af591218f686e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C9 5184 bytes
font_01_sfnt_off0000a43c.bin
f15ad79dff559d663e99e18e1e8382064bbc5166cd5b8b8a6e20d209e21f5688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA43C 11040 bytes

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