Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22280e2676a2812…

MALICIOUS

PDF

48.1 KB Created: 2020-08-23 15:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cec13e7e75b7ad20432a615abeff0968 SHA-1: 6ffa449236c20439aeae76ba82f491323ea8eda4 SHA-256: e22280e2676a2812ca42b5382521f618007e843ea01094ebd0e94c4963d84392
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to what appears to be a link farm hosted on Shopify, designed to obscure the ultimate destination. The primary malicious URL, https://ttraff.cc/pify?keyword=nespresso+vertuoline+pods+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to Nespresso pods, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious.

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=nespresso+vertuoline+pods+guide
    • http://tonewuze.blessingofheaven.org/uploads/1/3/1/6/131607131/d1a19df29ccd1.pdf
    • http://files.ohioedtech.com/uploads/1/3/2/8/132816042/cd7f29.pdf
    • http://files.thesilverbranch.com/uploads/1/3/1/4/131406605/5adc67a.pdf
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://files.paincave.co.za/uploads/1/3/1/1/131164236/pezifog-kamijewavabamo-xotogumo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/nawujawinite.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/christian_christmas_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0434/4643/6006/files/45543539935.pdf
    • https://cdn.shopify.com/s/files/1/0430/8146/6005/files/95910195670.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/45688391626.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/pulp_fiction_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0438/9063/9016/files/minecraft_saves_folder.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/30337403755.pdf
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/86149241751.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/aurelio_casillas_sptima_temporada_2020_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/atopic_dermatitis_in_dogs.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_off000071cf.bin
253206f2066bc5aca593eb118106d8caffc792857cfc3d57f87b6862067604de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CF 4828 bytes
font_01_sfnt_off00008251.bin
8915e2692813e3f360af27a78841eeb108bbb38b10ac173baae1c361021c5a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8251 10404 bytes
font_02_sfnt_off0000a5aa.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AA 4324 bytes

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