Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9a825042c56135…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 01:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad15c2d8a0b2e05803f54beb73d8e375 SHA-1: 0750f302961ed5234660194be2ec98a0f9594988 SHA-256: ab9a825042c56135f5f4f12911121db68dda4a663ee9d2113f680f399b9742d6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector and several other PDF links hosted on Shopify. This suggests a campaign focused on SEO manipulation or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=lagu+om+my+way+versi+dangdut
    • http://files.brianchovanecknives.com/uploads/1/3/1/1/131163599/539928.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/tinoxima.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/chemistry_of_boron_family.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/android_studio_tutorial_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/puxekagizobisowolizozax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/lamaribok.pdf
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/bemujakosijonuvijofawika.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/96741539378.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/alphabet_chinois_mandarin.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/daruxovovifipifos.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/lodosane.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_off00005062.bin
5887b757aac28dfdf773f8ef6fa5f6b4d6ffc852674afa374b178438b68fab7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5062 5308 bytes
font_01_sfnt_off00006279.bin
cfbbaa75b6b749dfefc7e0a1eacbb7147a9f3d05c9e54e99ffe352aa9f7afbff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6279 10596 bytes
font_02_sfnt_off0000867f.bin
001a2cec79a0a529cf2139078b3e0350c0b255f8594f27012b86abc3b3758506		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867F 16172 bytes

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