Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec1a4bdcfa3e606…

MALICIOUS

PDF

57.3 KB Created: 2020-07-30 10:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05f53c056f044f74665d029d8d9346c3 SHA-1: a41bcafb7e5334d02826891d3f2390d74adb2ba0 SHA-256: 0ec1a4bdcfa3e60686a98ec2518b8f985e9e807d8234d929a5e6547016de3697
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector at 'ttraff.cc'. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. While some Shopify links are benign, the presence of the malicious redirector suggests a malicious intent to funnel users through potentially harmful infrastructure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=amines+chapter+pdf
    • http://files.fionacompton.com/uploads/1/3/1/3/131383864/litarokog_vufiwupotel_zusasulunejemi_zarof.pdf
    • http://files.dauphinmensclub.com/uploads/1/3/2/6/132695714/1026803.pdf
    • http://files.tpd-art.com/uploads/1/3/1/3/131382092/71f3603e4a6696.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/nefatinerenoguxixodupovos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/zogotukezaduwuxazilanevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/gazefezumatemiwepudatun.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/59807470043.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/25167630555.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/supevuvurigulukowugovali.pdf
    • https://cdn.shopify.com/s/files/1/0433/8515/9843/files/76285296605.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/53452146626.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/runisipetuvoxirumitak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9737/5399/files/xowibefujulenonug.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3336/files/83164399644.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_off00009b0b.bin
7b60f89bfc15ebb9ee12d893813200e8db19fb3cb43bfdcb0a507b7c8940a4fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0B 5032 bytes
font_01_sfnt_off0000abe3.bin
95fbf724b4564c986943d3807a93cac32b8d20311148ca79279745eb4c399d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABE3 14036 bytes

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