Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c9f76943d9ab25…

MALICIOUS

PDF

44.7 KB Created: 2020-09-01 13:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9892c194f57f407352681cfea0e0d76 SHA-1: b0a597b45f206358b565a4c254d1e4fc7f64eb71 SHA-256: 62c9f76943d9ab25c96039569679537b5eab7dd398163311b6b25b7316f3418a
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 a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm.

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.ru/wix?keyword=badri+bangala+kathamlo+song
    • https://////albumartwork//https
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e5412a_ae83884390074b3b981c490af02fc851.pdf
    • https://static.usrfiles.com/ugd/b8c837_9757a9fd410f454e90d91bf7c36e36fc.pdf
    • https://static.usrfiles.com/ugd/136d07_4282289ecd4d4b35beadd59402c024ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_e270e11c35a34fff9b6ebb6ab25755c4.pdf
    • https://static.usrfiles.com/ugd/fedf23_029707fba15b42bdbd1e4e23983a8d72.pdf
    • https://static.usrfiles.com/ugd/daca0d_ffc1fad87d5a486288710746ff985111.pdf
    • https://static.usrfiles.com/ugd/b8c837_db9b540fbbe147f8a512187bec583164.pdf
    • https://static.usrfiles.com/ugd/b8c837_936e6d706b1745e681c286eb4167454a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ginowojero.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/character_design_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/24263094557.pdf
    • https://static.usrfiles.com/ugd/de3d83_603c69ebd322490cbca1209e979a5e4f.pdf
    • https://static.usrfiles.com/ugd/6cfc61_ba8398bd32ee46c3b6f3d19e622a1040.pdf
    • https://static.usrfiles.com/ugd/63d3ad_ada088a7510844c28b26632c8679c53f.pdf
    • https://static.usrfiles.com/ugd/0b46e6_b58574941ac5408f8a9f573c854719d2.pdf
    • https://static.usrfiles.com/ugd/963627_bd5e591fc0ba4f5f80f01d40adfaa2bd.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_off00006383.bin
99c6a4b162bd4f79b644895fe25f451dca51ece379cc3217a7a71f77a729cc1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 5492 bytes
font_01_sfnt_off00007602.bin
8c712078ea5820454892720c1b58d7484b4a9e5c5c44bc6670b0c596c3234e0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7602 15452 bytes

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