Malicious PDF — malware analysis report

Static analysis result for SHA-256 8689d864219f489a…

MALICIOUS

PDF

38.7 KB Created: 2020-08-19 21:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e426e162ef42e2f9f8c15985f6b47a9 SHA-1: 02d5db580097a38d7ea9ad4accc6c5a56503a9d2 SHA-256: 8689d864219f489a6fa687ecdbb6e2d30c9f05cc72fde0757c4845f2e6db2255
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it contains a mass external PDF link farm, with many links pointing to Shopify-hosted PDFs. The ML classifier also strongly indicated maliciousness. The presence of the malicious redirector suggests a phishing or malware distribution attempt, leveraging the numerous links to potentially obscure the final malicious destination.

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.cc/pify?keyword=e-+marketing+information+system+ppt
    • http://files.montcoseniorgames.com/uploads/1/3/1/3/131398366/gifolitag.pdf
    • http://files.sextonslegal.com/uploads/1/3/2/6/132682585/mepewisu_nasufeko_rawedizegi_fufori.pdf
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdf
    • http://files.silveroceangroup.com/uploads/1/3/1/3/131383733/pugezezumix_lasuxebepo.pdf
    • http://mojixizan.rightpointclinic.com/uploads/1/3/1/3/131398017/d93b674de9721.pdf
    • https://cdn.shopify.com/s/files/1/0437/7962/1026/files/51250977801.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/building_maintenance_checklist_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/48705175093.pdf
    • https://cdn.shopify.com/s/files/1/0436/3275/4841/files/lecciones_de_bajada_de_cargas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1475/8293/files/45185444934.pdf
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/los_compas_y_el_diamantito_legendario_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0440/4504/1814/files/bible_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/bescom_duplicate_electricity_bill.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_off00005a80.bin
9c0f83b44ea0eb37c4934d26fed9904b3009b56ec529c3b1ba4fcd47eabb6090
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A80 5344 bytes
font_01_sfnt_off00006cb1.bin
01ed7cfcfb853fce04544a4f01e845440543f42ecd1da1d3142c3f05a215d795
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 9836 bytes