Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f1bab889419988…

MALICIOUS

PDF

66.4 KB Created: 2020-08-08 18:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb1c970f92dc827e590925dcb4636d2 SHA-1: 6f35c992932cc90cf2421b29176ab6d7a45ff562 SHA-256: a6f1bab88941998804295e8b28e956275e6068d8fc8de7f8104a1dc3a59f5199
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.ru/pify?keyword=sine+pulse+width+modulation+pdf'. This indicates a likely attempt to redirect users to a malicious site, potentially for phishing or malware delivery. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of a link farm suggests an attempt to manipulate search engine results to distribute malicious PDFs.

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=sine+pulse+width+modulation+pdf
    • http://files.sobreribas.com/uploads/1/3/1/1/131164112/gazus.pdf
    • http://files.sklallamwarriors.com/uploads/1/3/0/7/130739509/16ad61921.pdf
    • http://files.carnivalglassworldwide.com/uploads/1/3/1/4/131455680/2537666.pdf
    • http://files.ocularsimulationcourse.com/uploads/1/3/2/6/132681749/kupitemijop.pdf
    • https://cdn.shopify.com/s/files/1/0439/5125/9803/files/centrifugal_pump_clinic_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/doxijuwuwidutanibawog.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/rotigaxeta.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/bokaravopot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/2012_honda_civic_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/worabesubitifelugabowik.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/fudofavapigodinenev.pdf
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/nitro_pro_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2130/2946/files/pelivatanumejifidesirefol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/86575149225.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/accruals_and_prepayments.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000990c.bin
9ca3b6fee8cda77b23df14338d34ecc80289c39e7d37da36396cd321360646da
pdf-font-stream PDF embedded font (sfnt) at offset 0x990C 5264 bytes
font_01_sfnt_off0000aacf.bin
4a007f29a8769c497e2adf368e022e5e548eda412660c6b9dcfa27d13243fc66
pdf-font-stream PDF embedded font (sfnt) at offset 0xAACF 14572 bytes
font_02_sfnt_off0000d903.bin
5355995778af6fea050508ce4debc46bc2ba7deab687ac039556469e1bec84fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 16064 bytes
font_03_sfnt_off0000eda4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 4324 bytes