Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e9fecc4feb0b72…

MALICIOUS

PDF

50.1 KB Created: 2020-08-23 10:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 569dbc0666086b8031c1ee877f4f6f8e SHA-1: 799ef202fe41ddbe3be7ab4d5f8f030ad50aef24 SHA-256: 62e9fecc4feb0b7204e009c99daf4bfd2b0fa43213670c34a8d9b59da423fb7f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text "Cabinet vision manual pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=cabinet+vision+manual+pdf
    • http://files.donnasdailydish.com/uploads/1/3/2/6/132681985/9442295.pdf
    • http://muxak.wayofthecross.ca/uploads/1/3/1/3/131379833/pamakofajakeduvi.pdf
    • http://files.taragraceericson.com/uploads/1/3/1/6/131606490/9294033.pdf
    • http://pixufegu.gettreschic.com/uploads/1/3/1/4/131453329/09fb6dde5d.pdf
    • http://files.tctexasbaseball.com/uploads/1/3/1/4/131453151/111998.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/dedifusiwepaxev.pdf
    • https://cdn.shopify.com/s/files/1/0444/1541/8534/files/naparobogabuwevef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4939/files/ripiwugigovaka.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/gegedorigor.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/88931347755.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/meditation_techniques_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/1071/1971/files/90339840170.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/liberal_arts_mathematics_a_florida_course_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/mopefiletisadi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e71.bin
277fd68db3f0495a64a7024d067e816ac415ecdda66e655e83bd11ba84953cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 5196 bytes
font_01_sfnt_off0000800e.bin
270946af96905c54a6423207c940bd3e09d9090db694590ded267d5447304f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800E 14484 bytes
font_02_sfnt_off0000ad20.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD20 4324 bytes

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