Malicious PDF — malware analysis report

Static analysis result for SHA-256 afed6a1632ee53f6…

MALICIOUS

PDF

43.9 KB Created: 2020-08-10 05:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01fffe6940d550039c78023315a1a2ae SHA-1: 1d9a73e651d0ffa5b2b77d95404489420e204e87 SHA-256: afed6a1632ee53f61ab62813b95022e93ce4737a329efafa3898d1149e425157
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=think+python+o+reilly+pdf+download'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=think+python+o+reilly+pdf+download
    • http://nibina.horseshelpingpeople.co.nz/uploads/1/3/1/8/131856772/xaludarapumom-fajubexirez.pdf
    • http://files.fbcandersonville.org/uploads/1/3/1/4/131438071/soxufipofovoxaf.pdf
    • http://files.whsnewschool.com/uploads/1/3/1/8/131871745/7047591.pdf
    • http://files.framemysore.org/uploads/1/3/1/1/131164090/f7e8b8.pdf
    • http://files.pawsacupuncture.com/uploads/1/3/1/4/131453354/digikip.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/22779472757.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/fundamentals_of_approximation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/62543030989.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/73685493906.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5264/files/23790082595.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/27163443687.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/66748743846.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3511/files/57819160973.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/76927305732.pdf
    • https://cdn.shopify.com/s/files/1/0445/5481/3599/files/acstx_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/17356438179.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/small_steps_download.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_off00005ef0.bin
d96a56138df251bf738196ed74d4693c9edf5b3e34a18abff8a62bd39bd3ea06
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF0 4948 bytes
font_01_sfnt_off00006fbb.bin
a81e54ebe1ae9a5457de6cab37e222afe04737629962c7feeb959a4d3d98ab7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBB 10204 bytes
font_02_sfnt_off0000929e.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x929E 4324 bytes