Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89916a35e876844…

MALICIOUS

PDF

44.5 KB Created: 2020-09-20 19:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31de89c14359d95de7aa9e6431095fbf SHA-1: 71ed5e5625c37b6f24b721fe6423804cd0a36892 SHA-256: f89916a35e8768441ec1dd045ba2770e4048c0f6b0868b4570807caa0944499f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is further supported by the ML classifier flagging the document as malicious. The document body and embedded link farm suggest a lure to download potentially malicious content, such as the 'nba apk mod 2k19' mentioned. The primary malicious IOC is the redirector URL.

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.club/wix?keyword=nba+apk+mod+2k19
    • http://files.irishblessingscoffeehouse.com/uploads/1/3/1/3/131380741/pitob.pdf
    • http://febadupi.literature2life.com/uploads/1/3/1/6/131637308/e5d19ab4.pdf
    • http://vazepoga.serveituplocal.com/uploads/1/3/1/1/131163667/3233d6e062e6f.pdf
    • http://files.swe-rms.org/uploads/1/3/2/8/132816165/sovatipupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/beledijuwaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/ssc_mathematics_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/mezuxat.pdf
    • https://01e57aa3-bc71-415d-b393-f7d4554590b7.filesusr.com/ugd/de60da_e1c52664b2d54d019409a6040302278b.pdf?index=true
    • https://202b13e1-638c-4623-a389-b6cfab0f936b.filesusr.com/ugd/0d2908_433a5772083842d692a9fb9aabff54a5.pdf?index=true
    • https://dc12037a-feb4-4166-891d-2b201e2ce16a.filesusr.com/ugd/f96b02_10d7ca8969e74b91bfa7892f1e164912.pdf?index=true
    • https://3f655a1d-dd56-40f0-8c6c-37a7bc5d0bdd.filesusr.com/ugd/12dc78_d5a706dc0ea74cc3acbdd8c40e64c5fb.pdf?index=true
    • https://37bb0ada-91d5-4e96-b075-f1ffbef69706.filesusr.com/ugd/66f3f9_33446350edfc4832b8820fbce5501ed1.pdf?index=true
    • https://6f63f4ee-70dc-447e-aa74-0ce80683b56d.filesusr.com/ugd/0d018b_23b7ce2fc8b244a0abef1bdc9230bc45.pdf?index=true
    • https://d658d18d-8202-482f-8f88-f705da9be2b5.filesusr.com/ugd/5bb01c_69a4a47e2a744c85a08e0916f7407d11.pdf?index=true
    • https://78058f25-7184-49eb-ab83-0fd2d2b9b333.filesusr.com/ugd/7a13df_ca98f7e984c244319e440868106a2ae5.pdf?index=true
    • 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/
    • https://78058f25-7184-49eb-ab83-0fd2d2b9b333.filesusr.com/ugd/7a13df_ca98f7e984c244319e440868106a2ae

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006374.bin
5b4d715bf04780e69aba3748c19db4696a02fb29c9cb13d96ae7bf948d5747d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6374 4748 bytes
font_01_sfnt_off0000738e.bin
392e95fa8efd5d44540f6d8c2163077e13d6e4a21f1df6d2fc7ca023c58f45ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738E 10392 bytes
font_02_sfnt_off00009745.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9745 4324 bytes

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