Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfd66f622656bcc…

MALICIOUS

PDF

40.7 KB Created: 2020-09-01 01:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc10aca347489c4546678d955f124b5 SHA-1: 2c9a29f5aa9a2d003a90158f9a2b7058344c0244 SHA-256: 9cfd66f622656bccdfae7c4b76b6213bb54107e255ae51edd08d5b8893da618b
152 Risk Score

Malware Insights

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

The PDF document exhibits malicious behavior through a large number of embedded links, identified as a link farm. The primary malicious URL, https://ttraff.ru/pify?keyword=marathi+movies+2019+full+movie, is a known malicious redirector. The document's content is obfuscated but appears to be a lure related to 'Marathi movies 2019 full movie'. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

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.ru/pify?keyword=marathi+movies+2019+full+movie
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/88160244001.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8129/files/bengali_romantic_songs_album_free.pdf
    • https://cdn.shopify.com/s/files/1/0463/4981/1869/files/marriage_d_amour_piano_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/exponentes_en_fracciones.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4325/files/plague_inc_cheats_android.pdf
    • https://static.usrfiles.com/ugd/b65acf_532f372b717948328559b6a6d092f733.pdf
    • https://static.usrfiles.com/ugd/7603ae_05d22745b8164df6861559c009ea0021.pdf
    • https://static.usrfiles.com/ugd/cafc24_7cc84883fcaf4359b5938e0904c85937.pdf
    • https://static.usrfiles.com/ugd/1ee69b_ffb338cf5f9e445cbdb75f954ab577de.pdf
    • https://static.usrfiles.com/ugd/6c032c_9d157cc76948481cbafb36f02b8c3cc0.pdf
    • https://static.usrfiles.com/ugd/dc98cc_12f96e1955d344b5a1be54370b22b5f2.pdf
    • https://static.usrfiles.com/ugd/15d534_e14c7f26720346d0a27d15f7a07a0863.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6fa92e436784cf9956ea7197c1b1fa1.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_off000048f2.bin
ace482485c1a8b737cbb51ad2afcc8308b97e025c5ccf03bd754ac5e8d183435
pdf-font-stream PDF embedded font (sfnt) at offset 0x48F2 5556 bytes
font_01_sfnt_off00005bb9.bin
d94250b06cc12ac2a3bd6c7c4c98f185ab1781a996a374f84f5c703b5f1e2704
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB9 10200 bytes
font_02_sfnt_off00007e56.bin
273cf655e084e22bb6acea72a7580180769d8287ff67eaee9de8d122a48ecf40
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E56 6168 bytes