Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc3f15a2e676da3…

MALICIOUS

PDF

55.5 KB Created: 2020-08-21 02:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f788871b17c1022d58ff3d44cebb0407 SHA-1: 92d5f64c78fb8f35b07bd53e3709dd518805fded SHA-256: 4bc3f15a2e676da37589cc8d02bacf020457c7ef60a5e65d6c2bea13edc63536
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to this redirector URL. The presence of a large number of external links, many hosted on Shopify, suggests an attempt to obscure the ultimate destination or to leverage legitimate platforms for hosting 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.com/pify?keyword=narasimha+naidu+songs++doregama
    • http://files.myphotographybyjess.com/uploads/1/3/1/4/131483201/629670b6d82f.pdf
    • http://vikupa.intergalacticbiz.com/uploads/1/3/0/7/130776445/monolujolo.pdf
    • http://pobenifug.soilandforestryservices.com/uploads/1/3/1/4/131406798/jepuriruwupovanu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/fire_emblem_awakening_decrypted_rom.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/66099736486.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/que_es_psicologia_forense.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/jegekagegututilurunuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/advertising_printing_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0460/0512/5281/files/recommendation_letter_template_google_doc.pdf
    • https://cdn.shopify.com/s/files/1/0436/2413/6864/files/ravasolawogagozefarevas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/kerewowar.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b1.bin
903743d74d394f6a27837e0ea2dbfcb7b9594f4f78876b5855a3448cd6da5eb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 7700 bytes
font_01_sfnt_off00007a8c.bin
c9fc825b97ff323bb70910a118f56948f6c6c95ef7e1d9cbb4b51c9188b036df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8C 4976 bytes
font_02_sfnt_off00008b40.bin
9b89202c967875290deef9ae404f4a375b0da5db822b1ed6261813e9b5942613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B40 9908 bytes
font_03_sfnt_off0000ad5c.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD5C 16164 bytes
font_04_sfnt_off0000c273.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC273 4324 bytes

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