Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aacfd720c668c12…

MALICIOUS

PDF

36.5 KB Created: 2020-09-18 13:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26354519266c32ef820b4ccb3fe1939c SHA-1: 27ccc858202919a3cea0bdfea1502d2fd5ecfb44 SHA-256: 2aacfd720c668c128d7ff5a1f957b82f1ca614d1ac8bb73009271d170a7bdad5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to a 'Dacor oven manual reset' and numerous embedded URLs, suggesting a phishing or social engineering lure. The ML classifier also 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.link/wix?keyword=dacor+oven+manual+reset
    • https://a99d6bdb-bd7b-481f-984d-d0a04ff5a4c7.filesusr.com/ugd/b73feb_6cdb6b458def415fbe9e279b6591f238.pdf?index=true
    • https://a5236ab4-9f8a-4719-8f5c-98c0f3f6e4bf.filesusr.com/ugd/dcf311_61484f2aefd64175891c66c27ab66cc7.pdf?index=true
    • https://157fd7cf-2cf1-4fd9-8f29-b37f4bb5f0e2.filesusr.com/ugd/54dfea_957b8a7ff0bc4a15ba3f15b6dbb9616e.pdf?index=true
    • https://0a954c03-5840-437c-81f1-eb7292d891a0.filesusr.com/ugd/3d0627_55cb09c311604ec7bbd514869ef92e70.pdf?index=true
    • https://41d9ad6c-7ff2-495a-b4e4-f6a48a4c1c03.filesusr.com/ugd/03f576_8fb47fedc3cd4bada0c20a8721b667d0.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/4436/4710/files/50588205405.pdf
    • https://cdn.shopify.com/s/files/1/0432/8328/4136/files/gerufefemebupinanuve.pdf
    • https://cdn.shopify.com/s/files/1/0444/3661/9431/files/libro_de_instrumentacion_y_control_de_procesos.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/ctet_form_last_date_december_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/26995291215.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/fobovij.pdf
    • https://cdn.shopify.com/s/files/1/0436/8308/6489/files/139708007.pdf
    • https://eca643db-a7d7-4d70-bca7-226716157877.filesusr.com/ugd/1a94e8_23d81007ebcc4c9997f803ac172c7438.pdf?index=true
    • https://e13f8151-4db5-40a2-9b4c-c3df1f634bdc.filesusr.com/ugd/3b7182_75b784c9c5d3498f8845603235607405.pdf?index=true
    • 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_off000045c6.bin
88821c5f7ebf7d8c46ffb167fe6672c55935d5a7e29b9275a606d16ddaeb9b2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45C6 4836 bytes
font_01_sfnt_off0000561e.bin
79c9b7345e320065cd08dbd2b5d071951ae4c62926cc69e3d31711e6a6279560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x561E 9656 bytes
font_02_sfnt_off00007735.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7735 4324 bytes

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