Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98cf4915da6adb0…

MALICIOUS

PDF

51.0 KB Created: 2020-08-23 14:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022d96f1a26bafafb8b5f808d23206cc SHA-1: fb554cfa310223e8b7049c09ed1e0fe1b814af99 SHA-256: b98cf4915da6adb0563662ff5c42b9b15084f635a214f4465a00e602641a09ca
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=apsacs+fort+road+date+sheet'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify, suggesting a link farm or redirection strategy. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring the user to a malicious site via a deceptive document.

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.com/pify?keyword=apsacs+fort+road+date+sheet
    • http://files.aminalake.com/uploads/1/3/1/3/131379168/pegewu.pdf
    • http://lilerafo.stayinsoftball.com/uploads/1/3/2/6/132681579/3813539.pdf
    • https://cdn.shopify.com/s/files/1/0430/1435/7151/files/fundamentos_da_agricultura_biodinmica.pdf
    • https://cdn.shopify.com/s/files/1/0459/9962/0263/files/toxigekidewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/job_application_letter_sample_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/gitarepufiwujetori.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/business_plan_template_for_haulage_company.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depusulolunifanilux.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/sudujudonazabodipigow.pdf
    • https://cdn.shopify.com/s/files/1/0435/1256/1819/files/winnie_the_pooh_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4861/files/sumetenuletujitaduruxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/69048714081.pdf
    • https://cdn.shopify.com/s/files/1/0429/9728/5027/files/wowotabapowegamepile.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/budabulixob.pdf
    • https://cdn.shopify.com/s/files/1/0434/5410/3713/files/gobulexuvokiletuma.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_off00006317.bin
93ece2a43255659c91062e30a467d1600821ad80e7af8009542bf0d10a13a8b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6317 5200 bytes
font_01_sfnt_off000074b9.bin
fa14b026014ed6469b9d2a9bd9929457692820b60affa0d1fe5e2fc00f636f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B9 10124 bytes
font_02_sfnt_off000097b7.bin
67ce9dbe68d8cc7aaa1c92167824d9b30b7f029cdeba5fed1513e316afd26a8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x97B7 23100 bytes