Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7d401c120c4aaf…

MALICIOUS

PDF

53.9 KB Created: 2020-08-31 20:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bb778cb1dba020aa7c0378401d263d SHA-1: 1e32873167ff4df822422b72a838574114e3c57a SHA-256: 3c7d401c120c4aaf4d8bc5c12fe68d52198ee6f859180c200da1208ac343b53a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded document body, though heavily obfuscated, contains the same URL found in the redirector heuristic. This suggests the document's primary purpose is to lure the user to a malicious website via the provided link.

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=ccb+asia+annual+report
    • https://static.usrfiles.com/ugd/b9801a_2d0edf035bc44d65b9d81d868ef83345.pdf
    • https://static.usrfiles.com/ugd/8ab72e_4de7404a037447a9858f4f4ecca09e64.pdf
    • https://static.usrfiles.com/ugd/b42fd6_bb140f2868c440669ee3be0a88ae59dd.pdf
    • https://static.usrfiles.com/ugd/374ce0_2f39acf468e34e4daa0f08b9e53388ef.pdf
    • https://static.usrfiles.com/ugd/ed64d2_97ed64d601824774af5ef8793e1bb635.pdf
    • https://static.usrfiles.com/ugd/529dbf_b485dddbcfda468bbe7d78ec47c01dc6.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/47102191122.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/ditofegidosoxefonebok.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/mijubonijomuzuxofanigijad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/kahalagahan_ng_akademikong_pagsulat.pdf
    • https://cdn.shopify.com/s/files/1/0461/3419/8425/files/93541206273.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/frecuencia_cardiaca_neonatal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/kobizusax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/chessbase_free_software.pdf
    • https://cdn.shopify.com/s/files/1/0437/9272/8224/files/trail_guide_to_the_body_student_workbook_5th_edition_ebook.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_off00007c02.bin
ced12c3697769533d53ff87fb97915eca49a3f37ee363a37d5f844c0336d8b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C02 4972 bytes
font_01_sfnt_off00008cf2.bin
d48e0e27c29ca3de0692804790579f083bd5feb27a0cd97e6d96bd2539a0782a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF2 10152 bytes
font_02_sfnt_off0000aff4.bin
92e0ec4c5450ac983464ada56e3496f24e4457c1166904717b3acbf18d414732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF4 17664 bytes

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