Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edf52751fb07062…

MALICIOUS

PDF

44.6 KB Created: 2020-09-03 23:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 170cbcc09782f5de63bf49d93aec8376 SHA-1: 670415b5d75dfd41219d0ef5c76183ded72610e9 SHA-256: 0edf52751fb070625928142171f7f344247c40f494bbdfdc5189aa9b93dc100d
154 Risk Score

Malware Insights

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

This PDF document contains a link that redirects to known malicious infrastructure, disguised as a free software download. The document body, though heavily obfuscated, contains the URL and appears to be a lure for users searching for specific software. The presence of numerous external PDF links suggests a link farm designed to attract traffic and potentially distribute further 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=building+plan+software+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8a419d_c5959b7b1ddd4c6cbc639b1133d3d9da.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_71459a9d875547088765530b84d580c6.pdf
    • https://static.usrfiles.com/ugd/76156b_8aa4e3a5750e463e85d8d81ee12d1736.pdf
    • https://static.usrfiles.com/ugd/15ebe2_c09c365605c3469581eb6a757268cde4.pdf
    • https://static.usrfiles.com/ugd/f3cb45_79edf240d9da445cb90874132675fade.pdf
    • https://static.usrfiles.com/ugd/03ae60_1471c335506d40deaaf8516f5f0021f1.pdf
    • https://static.usrfiles.com/ugd/7dfe85_eff5c5903b8c473382502ee4804b18cf.pdf
    • https://static.usrfiles.com/ugd/23b571_200eb0ef56944c7bb5f8705882bec785.pdf
    • https://static.usrfiles.com/ugd/ef253e_d81d9f13d5b0453a9842e2bc054fbe02.pdf
    • https://static.usrfiles.com/ugd/3f80ec_4b1b9c97f4e046219136ee2632f8693a.pdf
    • https://static.usrfiles.com/ugd/38bf1f_5f409978c47e477fb28326c5c4478fb5.pdf
    • https://static.usrfiles.com/ugd/0789d5_02b84ad949e8458b8bc4c7a45fb91789.pdf
    • https://static.usrfiles.com/ugd/e98895_e53e1f421286435792fbda6ca6d69cc7.pdf
    • https://static.usrfiles.com/ugd/21e6f2_5a823454c74e43378ba641cbf7ca10a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_736f5ea4b2b1488188eed9c4b98ec757.pdf
    • https://static.usrfiles.com/ugd/1f5cef_9d92c25519da42708b08bdda2b5f21f4.pdf
    • https://static.usrfiles.com/ugd/cc03df_cb80e4dd0fd04b40a7c6591a63779ee8.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_off00006fdf.bin
7af9bd267a582c4d1e2d19dd60bc37d5aed09c532fb4de46d749db57d26a77b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDF 5348 bytes
font_01_sfnt_off00008237.bin
ce81d8d48429765e2f9980abaa6f0f53ca49cb008c8f452a57bb827ef91280cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8237 10316 bytes

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