Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ca6a218b5e7c32…

MALICIOUS

PDF

35.3 KB Created: 2020-08-17 04:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13357ba8dba211faf077ecdb687b0dd2 SHA-1: 83733e163d9111b6f7857bf78fcc1697ff6eb6e3 SHA-256: 05ca6a218b5e7c3230eaa539d7bd30ad2e41be93a091b5d72c810eb2eae1e5e5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=yuri+boyka+images'. The document also exhibits characteristics of a link farm, suggesting a broad attempt to direct users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users.

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=yuri+boyka+images
    • http://files.turtlebeachpc08.com/uploads/1/3/2/7/132710491/8583117.pdf
    • http://zowix.kylesteffensmotorsports.com/uploads/1/3/1/0/131071073/pokumubifefajiz_jaxelodu.pdf
    • http://files.redrockpilates.com.au/uploads/1/3/2/6/132681392/9255355.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6696/4630/files/lunofetafapedajetukajet.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/pumokijizarodaruvuxeki.pdf
    • https://cdn.shopify.com/s/files/1/0434/1887/8117/files/91362065256.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/wuparalofakole.pdf
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/beginner_piano_book_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0434/5085/9670/files/alkali_tanah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0647/files/xuzamazapopateboxulusavob.pdf
    • https://cdn.shopify.com/s/files/1/0431/4798/5053/files/riladi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0168/2843/files/affidavit_of_heirship_sample_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/4274927510.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5918/files/54281431762.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_off00004b4d.bin
0cac1013b11b284e8079aa6ce4cc80fc6af156a28737e76ed1aa4554bf0a6f25
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4D 5240 bytes
font_01_sfnt_off00005d13.bin
26596f285c679ff7ac2ee98f4547e14af322b598109c7e6ef9f5a4de419b3013
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 10004 bytes