Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fafd6bc575d21f1…

MALICIOUS

PDF

68.5 KB Created: 2020-09-20 03:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10e1c9ca401b69fdfc77a6bfec56fb97 SHA-1: 2d1d000576289b877f52806bf390b528c6602efe SHA-256: 8fafd6bc575d21f17857b5018437fff1c5d129e0739a10f579058cc144e485c0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'constitutionfacts.com crossword answers' and the malicious URL, suggesting a lure. The presence of a large number of embedded links also indicates a link farm, a common tactic for SEO poisoning or distributing 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.me/wix?keyword=constitutionfacts.com+crossword+answers+intermediate+2
    • http://files.chrissybooth.co.uk/uploads/1/3/1/6/131606128/28bf5c450d.pdf
    • http://vebodol.jenniferrustsoprano.com/uploads/1/3/1/8/131856190/3113848.pdf
    • http://womefur.epowerlanguage.com/uploads/1/3/0/7/130776445/6514652.pdf
    • https://fb924e2d-c22e-4fe2-b8d1-5cf9f285b328.filesusr.com/ugd/e49726_88ef8a521f7e40e1aa0ca0235eeb74c0.pdf?index=true
    • https://1f0b4a0c-e970-4252-a072-2f75c1cd967c.filesusr.com/ugd/98e2de_04d8668e18f04835978b4f95e8fbeb8d.pdf?index=true
    • https://15e96ca9-7a7e-4ce9-9afd-4970cde2812c.filesusr.com/ugd/1c90dc_5e1f03328f634a39890cdb700adce9ff.pdf?index=true
    • https://dca476b0-619f-4efe-8387-9d95b598f271.filesusr.com/ugd/221eaa_e7edfd02caec40ffbafa0f68de61d047.pdf?index=true
    • https://78f1338d-aa6a-48ca-b98c-da837633a518.filesusr.com/ugd/defd8a_3e2556d05e104dd1bdab5ecac00dde2a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gubiwunezekubukezo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8751/8104/files/fiposokasudubikekozep.pdf
    • https://cdn.shopify.com/s/files/1/0452/1220/5216/files/always_and_forever_heatwave_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/digenexagewa.pdf
    • https://cdn.shopify.com/s/files/1/0437/6510/4791/files/51495608839.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/rusimovomonuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/38024014101.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/94237296159.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/series_63_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/dutozarasibabekowesad.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ade5.bin
e52c45f5638a68135fd6fc78cf705963ab71eccb9eacefae9461aec80a1e40c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADE5 5296 bytes
font_01_sfnt_off0000bfe9.bin
4e6373ef463edd580b35113eb2fc246134e2adedfd560e4c55dc14ba6f7d48d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE9 14152 bytes
font_02_sfnt_off0000ec01.bin
d4b15fc8a7e549cc2fb284ade89d2d94b0330b4ae270b0dc7de4d058741e0b64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 16384 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.