Malicious PDF — malware analysis report

Static analysis result for SHA-256 50035dbce7407069…

MALICIOUS

PDF

112.9 KB Created: 2020-08-24 01:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6f63c6e22ca6d0091b4992deecc0b03 SHA-1: 18ad3be474ad4e06173c22684f3fa4d51ed10e00 SHA-256: 50035dbce7407069546484d6c7753417c6a66106e84a4e2fc1c87053ab6360fd
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Captain america 2 movie tamilrockers' and the malicious URL, suggesting a lure for users interested in movie content. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, further supporting a malicious distribution strategy. The ML_NYX_PDF_MALICIOUS heuristic strongly flags the document as malicious.

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=captain+america+2+movie++tamilrockers
    • http://files.earlychildhoodeducationassembly.com/uploads/1/3/0/7/130739895/3188962.pdf
    • http://supaxini.thebridgeinnathorton.co.uk/uploads/1/3/0/8/130874368/7299908.pdf
    • http://manume.luciadisanto.com/uploads/1/3/1/4/131437246/9147940.pdf
    • https://cdn.shopify.com/s/files/1/0438/3594/9218/files/mikuzutusaxamaxoxesuxasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/81021517907.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1955/files/galantis_runaway_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/jemalezimik.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/palmistry_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5236/files/emsat_english_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/43849405891.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/94210773121.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/sugobapim.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_off00017ad3.bin
dc6d832e2503d4d9f988a0df5ff0b45ae7bb23173c4261781e2dc2aae477254d
pdf-font-stream PDF embedded font (sfnt) at offset 0x17AD3 5240 bytes
font_01_sfnt_off00018c92.bin
2b56108659ba62d32a12232c20a48684fbdd74a206a3b860ef6107ec4fed12bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x18C92 13024 bytes