Malicious PDF — malware analysis report

Static analysis result for SHA-256 acfef39e832710a2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 06:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f054deb0ee9643360bdbfdbdf0566968 SHA-1: ef7dd58962bb84ea3d2c9d586b3ef437d990319d SHA-256: acfef39e832710a2dc746201a823248d1eb7a48b8c66a1c0614733833d053239
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=kabhi+alvida+song++pagalworld', which is also listed as an embedded URL. This suggests the primary intent is to redirect the user to a malicious site. The PDF also contains a large number of embedded links to shopify.com, likely part of a link farm to improve SEO for malicious content.

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/wix?keyword=kabhi+alvida+song++pagalworld
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/acta_constitutiva_del_proyecto.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/shakira_waka_waka_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0439/2786/3464/files/perfiles_de_aluminio_catalogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7477/files/basket_case_1982_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/84085431166.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/doloj.pdf
    • https://cdn.shopify.com/s/files/1/0440/8436/3416/files/dekoxefojafefuviti.pdf
    • https://cdn.shopify.com/s/files/1/0465/4986/0502/files/the_history_of_slavery_in_america.pdf
    • https://cdn.shopify.com/s/files/1/0437/1070/9913/files/colman_ac_units.pdf
    • https://static.usrfiles.com/ugd/3e9e83_a7b12efddf3345bba9cdac7b9a7c1e42.pdf
    • https://static.usrfiles.com/ugd/06497e_ac31197d1c89487684ec6d0c0cce1331.pdf
    • https://static.usrfiles.com/ugd/0df15e_b1360f35772c43ef97ef79587b543bc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c0f4b80d85d444b39ac73b639e11c68e.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/babodipilutal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3382/9271/files/tuzunemipan.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_off00005dfa.bin
4ae83caa2b5365355c73900d01b907d088e096f3678996866561b3ac0c3dc2be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFA 5480 bytes
font_01_sfnt_off000070a1.bin
49dfb11c7a7684dc4b4ff3e7343a3a2cb038c911d19f6d32f6d675bdca5ccc2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 10284 bytes
font_02_sfnt_off000093b6.bin
364868b6cfed6318904d7573dfe64dfdfd5daf751dd5b5754916b5e8959ae08f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B6 3776 bytes

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