Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfea7bd033fb3947…

MALICIOUS

PDF

42.7 KB Created: 2020-08-09 08:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d655e64f38a5d956acae37b8cf8fba1 SHA-1: f6b0edf760e1c6b33566557c97448b284dd36d26 SHA-256: dfea7bd033fb39472c758bcaa12c7909285f4890d555efa615744630149350b2
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link farm designed to redirect users. The primary redirector URL is https://ttraff.cc/pify?keyword=collection+interface+in+java+pdf. The ML classifier strongly flagged this PDF as malicious. The document body is heavily obfuscated and contains numerous URLs, suggesting a lure to a malicious site.

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.cc/pify?keyword=collection+interface+in+java+pdf
    • http://files.sin-temptation.com/uploads/1/3/1/0/131069879/tugafijoba.pdf
    • http://zafolujid.stceciliacare.com/uploads/1/3/1/3/131383483/511913551.pdf
    • http://rurina.drchristophersmith.net/uploads/1/3/1/8/131872225/vebolul_namivikudewa_tufugep_xovim.pdf
    • http://gunosuzi.mtpskitchengarden.com.au/uploads/1/3/2/6/132695569/8036740.pdf
    • http://files.sidneyshelbychamber.com/uploads/1/3/2/6/132696145/fidujo_zuvetare.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/kewofepanugugenijival.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/multiplication_word_problems_worksheets_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/roxoramowapekigaful.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/kofulisefuta.pdf
    • https://cdn.shopify.com/s/files/1/0438/4843/3829/files/pdf_blob_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1644/files/deadlock_in_os_notes.pdf
    • https://cdn.shopify.com/s/files/1/0440/0558/9157/files/brainstorming_in_writing_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/kofezuga.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/34622449062.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/greek_alphabet_handwriting.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/86386032042.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/kuwukajomigives.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b89.bin
67390a385f1047ee559a821976c4468fb37c3295f33e2ec896710d4792125bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B89 5012 bytes
font_01_sfnt_off00007cac.bin
e158c464301c65e1e383e79b8b021582b2d2769c9f65e85d2060884049be76c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAC 9748 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.