Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae1aeb4c08d1c64…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 06:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 883d5da7d115040c1d01709128ec2f4c SHA-1: f41d3b643a5737cc5c2063d4086f5c2f8395cebd SHA-256: 8ae1aeb4c08d1c640155320a49747b121610a249a6ec5ad252a1e7c1faff7ee0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute malicious content. One of the URLs, 'https://ttraff.ru/pify?keyword=narrative+report+sample+for+ojt+students', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other links, including to Shopify, indicates a link farm strategy. 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.ru/pify?keyword=narrative+report+sample+for+ojt+students
    • http://files.conquergoodcreative.com/uploads/1/3/0/7/130775232/lemix-bozawobo-wifiv-telivuxakaduse.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/fractions_to_percents_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/58647620689.pdf
    • https://cdn.shopify.com/s/files/1/0440/7692/5078/files/watch_j_dorama.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/44483941438.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/boxing_training_at_home_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0427/9068/2783/files/gizowuvok.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/nudigofopujumolologo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/jovagujopuzuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/85074049023.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_off000070ac.bin
c4121bbca1cfa7bae3730caeebb06e6ee8bc117a44f54354a58088f0ebab1797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 5292 bytes
font_01_sfnt_off000082a1.bin
192c9dae822abe8ced3fd01f70a5f5123111985be0bfec336dd093a0ca3375ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A1 10592 bytes

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