Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae16acb6e7963ee…

MALICIOUS

PDF

35.7 KB Created: 2020-08-19 10:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf76511c57cae2110746f1d9ac8b4b0c SHA-1: a8b2296cecabf110196c80bf640f63b10e053c20 SHA-256: 1ae16acb6e7963eee0e9e8c397dd9563e87592e24cc7610ead768d737625b229
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic identifying it as a link farm. One of these links, https://ttraff.ru/pify?keyword=kesariya+banao+song, is known to lead to malicious infrastructure. The majority of other links point to PDF files hosted on Shopify, suggesting a coordinated effort to manipulate search engine results or distribute content through a seemingly benign platform. 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=kesariya+banao+song
    • http://files.jamesrcloyescpa.com/uploads/1/3/1/4/131453132/db3a67de37da.pdf
    • https://cdn.shopify.com/s/files/1/0434/2553/0005/files/27353671492.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/gipusaxudivor.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3169/files/wakugamaraxemimawawidijaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/geographic_information_system_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/neoplasia_de_prostata.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/75733376538.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/69201852634.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/97413792006.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/32437624330.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/bavawonetixigel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/63767293934.pdf
    • https://cdn.shopify.com/s/files/1/0434/1373/3533/files/sanorob.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/41978062983.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/74962762915.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_off00004595.bin
1eec1c981399b61d415fa261cc2dfaf0f4a60c2a336131f4124d7e3cd96600a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4595 5032 bytes
font_01_sfnt_off000056d3.bin
b537798fad2c1fc1aa77df7357430b0329d078e861fc9fcf21a2af8c68a8f7a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x56D3 13396 bytes