Malicious PDF — malware analysis report

Static analysis result for SHA-256 0283cd4790e72ad7…

MALICIOUS

PDF

44.5 KB Created: 2020-08-29 17:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81aafc6087c59fd17f562c072af8d30d SHA-1: c7e0f18795e09373a815dc569c0a55e8ac5da414 SHA-256: 0283cd4790e72ad79c830cf8519f43f5389eeef1d6c187af1b551c34daa95c50
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high density of external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. This suggests an attempt to drive traffic to malicious or compromised sites.

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=everstart+maxx+jump+starter+k05+inst
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_a0c9fc0cac2149649eced41ed819b38c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e793c5d1ce4c4a4885eb53c11826fe8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bf3d8c6071a45e3a927d926aac3c04e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8d04b7286c74c4d9313019fa351465c.pdf
    • https://static.usrfiles.com/ugd/3aca14_7096a95c879d466c9705fac2ac414eea.pdf
    • https://static.usrfiles.com/ugd/704566_93c16f5525f24ed6b8b7577498668f31.pdf
    • https://static.usrfiles.com/ugd/cc10e7_45b405e3151b4f0aa4dc721fa91c27db.pdf
    • https://static.usrfiles.com/ugd/0f5b72_36bd0f4bdf1a4517a332fce6016042dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cd6842a3f7347c39226023b7cdfbb40.pdf
    • https://static.usrfiles.com/ugd/429b25_cad9831d2ff549f6a1d71bf15f765458.pdf
    • https://static.usrfiles.com/ugd/b8c837_07afa77f3e634e66b134aafe6a3cc6c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1e65132d22e40e49b5d033b17b4eb19.pdf
    • https://cdn.shopify.com/s/files/1/0466/4184/0293/files/half_life_1_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/sixapuxinisoponexa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/risk_manager_interview_questions_and_answers.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ac.bin
2782f326cbb85eb798fe44b50beb0403f7d76e5cb2e4574f43cf86803126679d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 5196 bytes
font_01_sfnt_off00007448.bin
1e0a177147a5c6da159e306176ca8d9db6ecb9252846919bc4b190c0f037e1fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7448 10180 bytes
font_02_sfnt_off00009702.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9702 4324 bytes

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