Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14a014f74eef7bb…

MALICIOUS

PDF

47.7 KB Created: 2020-08-13 12:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ca52f3227767b0e8626647355c424a6 SHA-1: 508f5f652f22f25ad59264cb1320c936aa241785 SHA-256: f14a014f74eef7bb66aad4ff8e37df571c617535de8661e1f40d6fbe6ff5e5c5
150 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, includes the lure "medical parasitology questions and answers pdf" and the malicious URL. The PDF_SEO_LINK_FARM heuristic also indicates a large number of embedded links, suggesting a link farm designed to attract traffic. No scripts were extracted from this sample.

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.cc/wb?keyword=medical%20parasitology%20questions%20and%20answers%20pdf
    • http://files.russianspoon.com/uploads/1/3/0/8/130874369/8060980.pdf
    • http://xagikaz.brittanysloan.com/uploads/1/3/1/1/131164250/jiger.pdf
    • http://files.ironstonemeadery.com/uploads/1/3/1/4/131482976/f3e0f.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/safox.pdf
    • https://cdn.shopify.com/s/files/1/0438/4276/4962/files/indore_master_plan_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7074/files/apache_server_configuration_in_linux_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4121/files/juzurunaforujonepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/78984302035.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/17291585331.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/afcat_1_2020_result.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/63140337354.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/roserava.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/human_anatomy_atlas_3d.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/munchkin_boiler_problem.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/sibuvajazutupedemufipiso.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_off0000651b.bin
805989fdc52794e9a7e159c01e4065b4f6dfc9e34e136dfdedb3f625d7187571
pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 5528 bytes
font_01_sfnt_off00007803.bin
7bd91fe80aee2d57a6384066bb1ec45fb6ca4e90c77f42a76766af8352a10e58
pdf-font-stream PDF embedded font (sfnt) at offset 0x7803 13788 bytes
font_02_sfnt_off0000a352.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA352 4324 bytes