Malicious PDF — malware analysis report

Static analysis result for SHA-256 0665d78ea1a0aa9f…

MALICIOUS

PDF

33.9 KB Created: 2020-08-01 12:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a63ede5ae8fe2a5b39e18c592717056 SHA-1: 48a93c2107b52f1d8e9a7ab61e0dbd4d9276c41e SHA-256: 0665d78ea1a0aa9f1c294586847319d4153735dfb1013d79e11c526759c6bfdb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'ttraff.com' domain. The ML classifier strongly indicated maliciousness, and the presence of a redirector link further supports a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering attack.

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=kuta+software+factoring+quadratic+expressions
    • http://files.lllpwd.com/uploads/1/3/1/4/131408502/vafotiduda-lojeta-kamovirawu-negatopagirolop.pdf
    • http://files.deansoiltrek.com/uploads/1/3/2/6/132695697/bizamuril_feparaguse.pdf
    • http://files.shobukanisska.com/uploads/1/3/1/6/131637125/be500c8550285e.pdf
    • http://files.serviceprograms.org/uploads/1/3/1/6/131637896/3247886.pdf
    • http://files.esandypowell.com/uploads/1/3/1/4/131406173/8844565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/wivaretobafijimane.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/zefirokinukagefalozusozof.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/48503576004.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/john_deere_refrigerant_capacities.pdf
    • https://cdn.shopify.com/s/files/1/0433/4478/9669/files/37625762688.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54686169254.pdf
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/mortal_kombat_drahmin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65529241957.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/nukidilazazerebejutuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/0514/7298/files/comfort_sentry_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/j4_top_build.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_off00004939.bin
bdcd8b9817ddd71547f69b07614513ed4c9e66b9e3b16e3063728a538197f444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4939 5544 bytes
font_01_sfnt_off00005c49.bin
684d1877fafe0dd6f2c95b7d946f2a4990079bc0d569e12d12f901aa6e8c202b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C49 8888 bytes

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