Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c395dc2541d8efc…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 02:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2660848dbfed818c38f8c38a47e7f54a SHA-1: 9c711b9e0a7796dc1483b782c93c1d646e7944df SHA-256: 5c395dc2541d8efcdc56fc72b5c918a74ed5e296c5021ed4d644247035b58227
202 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure at 'ttraff.ru'. The document body and heuristics suggest a lure for downloading software, potentially to deliver a payload. The presence of embedded links and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicate a multi-stage attack where the user is prompted to interact with malicious content, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gta+vice+city+indir+gezginler
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/2412/2773/files/regular_hexahedron_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/xobomojisoketuwerulujare.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4332/files/niwezodarobidepepeduk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/30466441694.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/95332621305.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/77243796980.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/oxford_english_grammar_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/36833469546.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/bylaws_for_nonprofit.pdf
    • https://cdn.shopify.com/s/files/1/0434/5374/3270/files/paradise_lost_giles_milton.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/denukuzujofil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/jirepuxosig.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/18762236065.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/gym_workout_program_for_male_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/90461660749.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_off00006a53.bin
86500ef4f4a3f4e0d98131337dcef397c6f22593138a7938785a9710f0f09978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A53 5172 bytes
font_01_sfnt_off00007c12.bin
747be2dc98837b9c57d1e78124f17ff1c0ea8d14bcb78743ee89e448e3ceca9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C12 10700 bytes

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