Malicious PDF — malware analysis report

Static analysis result for SHA-256 06abfc94356ef44a…

MALICIOUS

PDF

44.3 KB Created: 2020-08-04 23:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b987ff9f756efc77d6ae320d2a3f79 SHA-1: 51961ab33d02e1151c9a85c9ac84eeb93249d5b1 SHA-256: 06abfc94356ef44a428f1276fb887c3bf439bf0a8ce6ea96af088a393b5c1a24
154 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, masquerading as a price list. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=bakery+equipment+list+and+prices+pdf
    • http://files.hcmiseapacific.com/uploads/1/3/2/6/132695455/dikokusazulawi.pdf
    • http://files.baltimorereadaloud.shop/uploads/1/3/1/4/131453121/9b1a381fc9e.pdf
    • http://futabepid.ninetyfiveandbeyond.com/uploads/1/3/0/7/130776208/nuzer-nedodesapif-rabavumewab.pdf
    • http://files.shabby2chicsalonandspa.com/uploads/1/3/1/4/131438464/ruvilopusufirokerez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/metiliwetizo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6094/files/54205828498.pdf
    • https://cdn.shopify.com/s/files/1/0433/5134/3269/files/wabofomalevijisoxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/attestation_d_employeur_destine_ple_emploi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/nusunudomuvufupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4755/files/sevoka.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/95717521879.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/49982376167.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/36030891245.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/bigetalubukagizarudixiraz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/58277292868.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/pdf_text_to_speech_reader_free_download.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_off00006413.bin
09ff93818bca82fbbf71aaaf6d6070f1a1162ae948a159a6d2ffe76a6df9adfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6413 5644 bytes
font_01_sfnt_off0000773e.bin
3584f0b2eaeaba80e88689e44a4811f7eb7b2a50d9a6f98964184be37ebffaf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 14540 bytes

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