Malicious PDF — malware analysis report

Static analysis result for SHA-256 f997c21fb79c41a6…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 16:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 017109099ce5d890e6320dd4cf23e238 SHA-1: a999932d8fed2c7b0ebec95acbfa67edde7c36e6 SHA-256: f997c21fb79c41a6f5c07c4610b00f5f0548cce5480e0ce290378eb8ae1e9f21
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=medicare+part+b+fee+schedule+2020+pdf', which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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/pify?keyword=medicare+part+b+fee+schedule+2020+pdf
    • http://files.biohealthworksinstitute.com/uploads/1/3/1/3/131383838/f1fc68331.pdf
    • http://files.vpsareunion.com/uploads/1/3/2/6/132695747/xojot.pdf
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • http://files.snapzphotobooth.co.uk/uploads/1/3/0/7/130740262/domosepele_surib.pdf
    • http://files.heartlandchurchnetwork.com/uploads/1/3/2/6/132695639/mepototipoxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/29149155231.pdf
    • https://cdn.shopify.com/s/files/1/0435/8592/9375/files/fomunazagirerizedobijefif.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/encyclopedia_of_mathematics_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/50230736662.pdf
    • https://cdn.shopify.com/s/files/1/0437/0438/5690/files/gotupaworebakojujadaraxek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/vilepobew.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/nutafusaligiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7156/9046/files/jurizadinawawexukixepur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/safedumorimuruxikukezite.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2685/8662/files/fefatijelumofipojon.pdf
    • https://cdn.shopify.com/s/files/1/0431/1678/9927/files/23897280645.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_off00006c43.bin
08eb33e2edddb463056d957024c0d2aafe2ed5c24f4fd9c70e85eb4f342dfdd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C43 5664 bytes
font_01_sfnt_off00007f83.bin
6376ec6b205eadaa0b316a0a8abe0756065b3e44837c8779d1ba7e5aa11d2ddc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F83 10144 bytes