Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec22cc64257c047…

MALICIOUS

PDF

43.0 KB Created: 2020-08-09 20:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce55b06caafc276db50549529ea38f3a SHA-1: 70ae21a513cd7c15a11ad1a4e3b3f18ad8e71ad6 SHA-256: eec22cc64257c04703085f6de0ccdcd77f905f4de3d58f721c6aa35f56592d8a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=german+english+dictionary+pdf+download', suggesting a lure to download a dictionary PDF which likely leads to malicious content. The presence of a mass external PDF link farm further supports the malicious intent.

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.cc/pify?keyword=german+english+dictionary+pdf+download
    • http://files.leapaheadcenter.com/uploads/1/3/1/8/131872273/kiveloxavewasu_watur.pdf
    • http://files.getdropmint.com/uploads/1/3/1/8/131856877/3881239.pdf
    • http://files.ludlambrass.com/uploads/1/3/1/8/131856232/vutukaxeluwoz-nalusemeru-pesolo-nugeziponev.pdf
    • http://lodaneva.maximiliangoetz.com/uploads/1/3/0/7/130775413/9d3d2d59.pdf
    • http://bitida.altent.com/uploads/1/3/1/4/131482995/zawirovobatiden-rozid-mosok-ninarifupopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/arbeitsbescheinigung_jobcenter.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/minecraft_mob_grinder.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/91802688127.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/18._2_modern_evolutionary_classification_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5621/files/daritazigefodowofira.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/alloplastyka_stawu_biodrowego_pozowski.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/89254106178.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0359/files/descargar_catalogo_de_truper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/insanity_max_30_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/58152323175.pdf
    • https://cdn.shopify.com/s/files/1/0432/8695/4139/files/adobe_dreamweaver_cs6_full_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/3538/5243/files/55298618370.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_off0000694b.bin
ab325935e0c56961f2d825b2151477223a2707ff924ad2ccf81e5369d56a87d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694B 5792 bytes
font_01_sfnt_off00007cee.bin
90783cee91670c00c7f78bf45363783a6937b1227b3d691102bc94087f5ba46f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEE 9808 bytes

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