Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f9cb37dd69dfb28…

MALICIOUS

PDF

50.5 KB Created: 2020-08-24 01:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a03d343410109b43177ea8625110c61 SHA-1: 704cc842a3d5ab051e8d12ccddb138c71184258d SHA-256: 6f9cb37dd69dfb28cc1008e2a88fb1b6f9ebb567769c87c80ec74133210fc22f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or are part of a link farm designed to manipulate search engine results. The primary malicious link identified is 'https://ttraff.cc/pify?keyword=madden+19+rookie+ratings+spreadsheet', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a coordinated effort to drive traffic to potentially harmful sites.

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=madden+19+rookie+ratings+spreadsheet
    • http://mewazagis.brendargarcia.com/uploads/1/3/0/7/130776208/1aa564aafba3.pdf
    • http://lawusa.sunshinefamilyhealthcare.com/uploads/1/3/1/4/131452954/fiparuzekugope.pdf
    • http://kujaruxob.pdi-nusacc.org/uploads/1/3/1/4/131406436/4e7bfec.pdf
    • http://jamaj.theopenbus.com/uploads/1/3/2/6/132683138/vamusedejagi.pdf
    • http://files.sspeterpaulpassaic.org/uploads/1/3/0/7/130775784/5596887.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0463/4676/4450/files/chipotle_chicken_bowl_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/fepadutobezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/tamilrockers_movies_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/panatujubuxuvoro.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/kevalimaduwodezota.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7561/files/19122132685.pdf
    • https://cdn.shopify.com/s/files/1/0435/1475/7288/files/tarozu.pdf
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/51351023874.pdf
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/snes_emulator_roms_pack.pdf
    • https://cdn.shopify.com/s/files/1/0439/5309/4811/files/xamoniginifapomesexo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/cataract_in_dogs.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_off0000872c.bin
6bf77b3a534e66b7dbe28c0ee366291fec60dc9ebc39e8e7c9718f8ecc03f566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x872C 5468 bytes
font_01_sfnt_off000099c9.bin
fd1a62dfdc63bb51e4e9f99c0e6586849884e99cace8e1a251c8dd3df21ea959		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C9 10244 bytes

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