Malicious PDF — malware analysis report

Static analysis result for SHA-256 41bce234220e1283…

MALICIOUS

PDF

48.5 KB Created: 2020-08-10 09:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 350fdbb54bd914b035c4eb706cb8a86f SHA-1: f845b21a1e9fa7cd450ba65d784af8ce1010fa1f SHA-256: 41bce234220e128361e528e98416c96aa53bd97b369e018bf2910fc398fb2588
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector disguised as a Schengen visa application. The primary malicious link is https://ttraff.com/pify?keyword=application+for+schengen+visa+pdf+switzerland, which likely leads to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL and other benign-looking Shopify URLs, suggesting a phishing or redirection scheme.

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=application+for+schengen+visa+pdf+switzerland
    • http://files.rebelwebsolutions.com/uploads/1/3/1/1/131163712/fff4f18.pdf
    • http://files.vintagevibelou.com/uploads/1/3/1/4/131453451/1044873.pdf
    • http://files.vocalline.dk/uploads/1/3/2/8/132815365/3505274.pdf
    • http://files.talkitupbendigo.com/uploads/1/3/0/7/130739713/xomuwo.pdf
    • http://kifofali.massanuttenyouthbrassband.org/uploads/1/3/1/4/131406717/jekojugesokerir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/67505825375.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/rofebafow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/72424487838.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/rixetewulagalol.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/nazibifujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/writing_topics_for_ielts.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/change_file_to_word_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6668/7639/files/1776262772.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fenuvoxetorawiga.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5978/files/zineradifenulozotitumop.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/kuwudakafevumupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/technical_drawing_with_engineering_graphics_14th_edition_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067e9.bin
2b3b32bc3f8bbefe917104ea49ca53ede88ee9e24003120b82634c305f3209c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67E9 5396 bytes
font_01_sfnt_off00007a52.bin
8cb2fe010fff18eae792e61dec0ee2e75d9b14df1cdc96b88b2e0e63f8183b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A52 13968 bytes
font_02_sfnt_off0000a677.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA677 4324 bytes

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