Malicious PDF — malware analysis report

Static analysis result for SHA-256 086927c2450f122a…

MALICIOUS

PDF

64.3 KB Created: 2020-09-18 17:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38a9d8f9db74f7c8f7d1b97e5830560b SHA-1: 3d377e63e9ff3ffd540136630b89a81409764d15 SHA-256: 086927c2450f122aadcd879f192a4df157eac56d6f90fd868b8ef8a9602bcceb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded document body contains a URL that points to a known malicious redirector, suggesting an attempt to lure users to malicious content. The presence of numerous external links, many of which are to PDF files hosted on various domains, indicates a coordinated effort to distribute potentially harmful content or manipulate search engine results.

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.club/wix?keyword=debbi+peterson+drummer
    • http://files.craighawkinsart.com/uploads/1/3/1/6/131606198/3684108.pdf
    • http://files.hornsbyptsa.org/uploads/1/3/1/3/131379434/bomujakurufilo.pdf
    • http://files.thebracketpros.ca/uploads/1/3/1/3/131384300/b4a371554.pdf
    • http://files.themoomabides.com/uploads/1/3/1/1/131164275/duwubenojukarod-vuwubip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://d29366c7-b62e-4cea-bb6b-cdbcd68a6a46.filesusr.com/ugd/1813b3_82dacc7655e24d11a4219b086f051b7b.pdf?index=true
    • https://dd994bf8-3e5f-49e2-aca0-f38c066bfe7f.filesusr.com/ugd/70e7d4_d74b376e6e4242a4b1f2e8fc21f23803.pdf?index=true
    • https://e98b6c00-6f5f-4ece-8dd3-7963fe149041.filesusr.com/ugd/a9e086_a12d6efc8baa484caec685b92c8f685f.pdf?index=true
    • https://f8466bd6-4f5a-4f78-bf07-15e1248eadc3.filesusr.com/ugd/1b8612_d5f92ec246f8469fbd46f705c2ad2528.pdf?index=true
    • https://63b7931e-98d7-4d2a-92da-1d55c6475a3a.filesusr.com/ugd/1813b3_f563f833bfb1425c8217e782f3a09aa1.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/2528/5791/files/21144854212.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/massey_ferguson_135_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/3951/1960/files/vutasafonepatalolijelul.pdf
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/camisa_do_flamengo_2018_3_uniforme.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/alcatel_one_touch_pixi_instruction_manual.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_off0000b2e5.bin
dfb8a7a5e4584ecee68dc59b029c9fdd76422acddf4ce1c6ebaddee27cf3e37f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E5 4884 bytes
font_01_sfnt_off0000c35c.bin
c43ed507b50de002c5c38ee6a3d49aae08221aceddef9eb732e7961ea21e487e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC35C 10220 bytes
font_02_sfnt_off0000e662.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE662 4324 bytes

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