Malicious PDF — malware analysis report

Static analysis result for SHA-256 324eddbc8881ccd6…

MALICIOUS

PDF

83.8 KB Created: 2020-08-03 12:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5600aeafd9fcef9dbc6ee6bf1d75b0 SHA-1: a4ca4ea8672da631edebc724593df7d8c296c159 SHA-256: 324eddbc8881ccd6959aeb2794305125c90dd09229c26e08a0c11b08b48c4d4c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.com/wb?keyword=taquicardia%20paroxistica%20supraventricular%20pdf%202016. Another heuristic indicates a large link farm, with the first URL pointing to cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body contains text related to the embedded URL's keyword, suggesting a lure.

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/wb?keyword=taquicardia%20paroxistica%20supraventricular%20pdf%202016
    • http://files.shannonvallor.net/uploads/1/3/0/7/130775701/gufenu.pdf
    • http://files.casapasofino.com/uploads/1/3/1/1/131164100/4618394.pdf
    • http://files.gijogymnasticsofillinoisjuniororganization.org/uploads/1/3/1/8/131857152/2206830.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/stone_sour_wicked_game.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/sazebodamojozufus.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/32478772956.pdf
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/mobowinikisukunapenizado.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xiwisabimetabif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2684/8661/files/30890273042.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/30314196961.pdf
    • https://cdn.shopify.com/s/files/1/0450/0822/4414/files/how_to_cheat_on_study_island.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/97180027868.pdf
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/64449463010.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/41588437586.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/30609752492.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede4.bin
fad79edd0e0d96a44e07fd76711b5aed6323b755887efd5a46cffe69a89b0ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 3184 bytes
font_01_sfnt_off0000f93a.bin
037437ee70cb05703c1c7f475aaf31cbac1e57144b740e84d5f3a90fe1b5404f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 5716 bytes
font_02_sfnt_off00010cc6.bin
28dbda784b53fb7bf6de8b38fdb0c662213505d7840e30f1a894ba5dde5d5161		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC6 11024 bytes
font_03_sfnt_off000130c0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130C0 4324 bytes

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