Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f96c61b32abafd…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 14:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82076fd03324b73079979422d91261c6 SHA-1: afbe202348d04f923dfce8bfb7feabf31be8dadf SHA-256: 63f96c61b32abafdb07653688f12389cf0bede1b536aac032fafc82d5d0324ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, indicating a deliberate attempt to redirect users to potentially harmful content under the guise of a book download. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=residential+interior+design+book+pdf
    • http://files.habitualspender.com/uploads/1/3/0/7/130740196/juwoj_wofekajekib.pdf
    • http://fafulin.onceinawifetime.com/uploads/1/3/0/8/130874218/e944754214433.pdf
    • http://files.sallysweetland.com/uploads/1/3/1/4/131438249/e377953a8cde1ef.pdf
    • http://files.makwawamalawi.com/uploads/1/3/2/7/132740860/zuder.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/mumen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9767/0303/files/sowexejokesoteluri.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/6183219469.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/tururaranimejisep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/32676746845.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/fovaxumawiteb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fasexerogetotano.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/setup.pdf
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/70748023457.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4698/files/dozajamilefepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/vector_addition_problems_with_solutions.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f0.bin
cc6e29459dfa9489cfdeee20be72e7b65c680826a0959c405a7d6179f14b6d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 5420 bytes
font_01_sfnt_off0000776c.bin
2739267e6e79143096c4723f36e113bd63071ad7c51a46f6c307b71115d78f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776C 10192 bytes

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