Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0eae0c650a0792…

MALICIOUS

PDF

41.4 KB Created: 2020-08-14 15:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b613c4d7045aac918356f45359bbe01e SHA-1: 3dfee0087190e6bc7818c3f7251e40761f60fed6 SHA-256: 8b0eae0c650a079232b463d3b4a68cb716d6c0cd29642a2e07dae4f9f1d1fea0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=beams+and+columns+pdf'. Another critical heuristic noted a large PDF link farm, with many links pointing to Shopify domains, suggesting a potential SEO manipulation or content hosting strategy. The document body contains garbled text and embedded URLs, further supporting the malicious nature.

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=beams+and+columns+pdf
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/2/6/132681938/wovaxale.pdf
    • http://files.kensawdustherapy.net/uploads/1/3/0/8/130814735/14fe21189d93e.pdf
    • http://pavom.diyslimestudio.com/uploads/1/3/0/9/130969754/tavebijudogoxikozem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/learning_english_speaking_bangla.pdf
    • https://cdn.shopify.com/s/files/1/0437/4285/5319/files/gikesawaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/setalufenu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6520/3093/files/not_a_valid_photoshop_document.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/84339996459.pdf
    • https://cdn.shopify.com/s/files/1/0433/2398/1979/files/wifipopejalafopopeku.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/how_big_is_ark_survival_evolved_gb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6372/8545/files/gupojuremipovubotarakujo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/aerodynamics_of_wind_turbines_hansen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4726/4166/files/53244956936.pdf
    • https://cdn.shopify.com/s/files/1/0435/3123/9588/files/23886558418.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6791/files/free_business_card_maker.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_off00006546.bin
3dcb1adc7f7e1cbd79eedb25bfe441ff04de6a819b1d37a24a0605f20cb95220
pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 5256 bytes
font_01_sfnt_off00007713.bin
6e14d2d168eac0516c5aeb5051d5cfc7eb6bcace0de712b4196f6b505a2dc7a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7713 9988 bytes