Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdf65a57cf4e8de…

MALICIOUS

PDF

43.0 KB Created: 2020-08-06 04:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a62386c0e0f2fc45cdb366420d5a2b35 SHA-1: 8657a9f492742a55a0886245cb695391ca5a4ed8 SHA-256: 5fdf65a57cf4e8dec233a54cf00ab0809a8625585d1b472e6d53f33540a5188f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO spam operation. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/pify?keyword=hamlet+appearance+vs+reality+essay+pdf`. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=hamlet+appearance+vs+reality+essay+pdf
    • http://files.munchingnumbers.co.uk/uploads/1/3/1/1/131163579/turozulo-kijikuze-benelukixuse-digeze.pdf
    • http://wonufas.lorraine-lopez.com/uploads/1/3/1/8/131871674/4e7045.pdf
    • http://files.neotrainehr.com/uploads/1/3/2/8/132815343/kapuwot-tebof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/49353074740.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/wumirexuvepotilobip.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/historia_de_la_bandera_de_panama_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sesolofulazige.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6697/files/lobepusadofisarosal.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/roxana.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/34104650833.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/54322776945.pdf
    • https://cdn.shopify.com/s/files/1/0440/6411/2805/files/vigipip.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/24001854828.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/clinical_trials_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/82424371070.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af2.bin
8e6be649b9115ec7b6ec31f850d0b0b84a1f8f06a45071de7f52a81934b337fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF2 5424 bytes
font_01_sfnt_off00007d59.bin
64d086e9293e730fe9610b32aa80210f797a8a9cb8c35ba12167cdbc8e4a9aac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D59 9956 bytes

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