Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e74033df6e33115…

MALICIOUS

PDF

41.6 KB Created: 2020-08-22 04:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2b252ae86461eb573849a7be0e689a0 SHA-1: ef131038261252e5d2fdb45b6f86c28f2f1ae7b8 SHA-256: 8e74033df6e33115437c494f3ef41b298ebd287f3a712b5f219fc7939f2daa0a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, indicating a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=kundali+bhagya+status+song', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the document's purpose is to drive traffic to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=kundali+bhagya+status+song
    • http://rorupol.thecatsmeowtarotandtalismans.com/uploads/1/3/1/0/131070027/9267947.pdf
    • http://files.sherinyoga.com/uploads/1/3/0/8/130814226/c8712b.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/bubulubole.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/gosetovun.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/jamboree_scout_guide_video.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/a_decima_profecia_celestina.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/42889154334.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/86210203442.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/44690616074.pdf
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/ibc_application_to_adjudicating_authority_rules.pdf
    • https://cdn.shopify.com/s/files/1/0433/8024/4643/files/merge_mac_os_preview.pdf
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/zutigumutepotof.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/sodarovozewukinugijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gimuwuwizarisatin.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/virgil_aeneid_fitzgerald.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_off00004d34.bin
1d4ff8e0b475dfdf645265fa9fd85ebb66002c5b160172f6e0500bb80efd48bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D34 5204 bytes
font_01_sfnt_off00005edf.bin
e521d7c7640b86a30e8cc5d65d89f60629f0f3488c2ca0dccb99f08c823a31cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 11004 bytes
font_02_sfnt_off0000840f.bin
dcc437beaabc532c244cb2402c7e187dabb6fccd34af89cd9e2270a2a4498d3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x840F 16168 bytes