Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7651e1ce945c80…

MALICIOUS

PDF

65.3 KB Created: 2020-09-19 01:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a65f3562bb65f255f6317f433790fc SHA-1: 4e0ccbdf35cc98ccc3089d49226783ad608a0700 SHA-256: 5c7651e1ce945c807f804396ea03b31e19c4a673878f16f9a998996c525109a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous external PDF links, many benign but some potentially malicious, indicates a link farm strategy. The ML classifier strongly flags this PDF as malicious.

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=siete+maravillas+del+mundo+antiguas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4495/2471/files/yugioh_nightmare_troubadore.pdf
    • https://cdn.shopify.com/s/files/1/0464/5496/4392/files/peace_tv_apk.pdf
    • https://cdn.shopify.com/s/files/1/0439/5555/2414/files/spiderman_coloring_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/5084553863.pdf
    • https://c821ba03-3b2a-4c99-aa91-3c48a7ff0cf2.filesusr.com/ugd/e54fc7_17bb261b97de47dea2ae3dcf61a92d41.pdf?index=true
    • https://2261e19d-795f-4469-ad5d-a7154b0f5d9a.filesusr.com/ugd/e80f4c_92fd2e0403d642d6bfac39591d7ab3ee.pdf?index=true
    • https://f8ef0beb-4dd5-4037-bffe-9170985248cb.filesusr.com/ugd/4bb894_f7f60360c3964d678adb2eb72f9fd595.pdf?index=true
    • https://f6e271a7-826b-4c4b-887e-ca91a12a2de2.filesusr.com/ugd/2f7815_2e66d8bd5d084060bb7c30ec9ab9e2a4.pdf?index=true
    • https://33bed742-6482-4240-84c3-10cd33320220.filesusr.com/ugd/65b209_44d4cc3e77e8439ea8943cd571ba96ee.pdf?index=true
    • https://c5c5e2b6-85b9-4b97-9a9f-620b8a0e8aa2.filesusr.com/ugd/575fb0_13b02dc16f864f4ca7ec2fae07e6244f.pdf?index=true
    • https://0f2455fb-8ce5-42da-bb81-c09401b0cb68.filesusr.com/ugd/205ae4_108985ffba5247b99b6353786e74c8f1.pdf?index=true
    • https://1e531181-52ee-47bd-a8c9-7483d5cb94a2.filesusr.com/ugd/158fb9_083b2601490640679e131d41a1aa467e.pdf?index=true
    • https://9024ed98-3824-4c48-ae7c-19aed7be80a5.filesusr.com/ugd/bcb9fd_bb2fae5d0e7141adb4d352e64046ac93.pdf?index=true
    • https://8068213c-af32-48a7-be4e-518716531f70.filesusr.com/ugd/0f9ef0_5a7d71a9871947e695c8b683bb998b62.pdf?index=true
    • https://7b432c0f-321d-469c-8449-17109345575d.filesusr.com/ugd/d38238_53cf785a6ecd42af8a00926e731002fb.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb22.bin
7bbc1557c86c93fef08fb082ad6d07234dbe195ef33bcc2576f8e39c4c4a5e37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB22 5308 bytes
font_01_sfnt_off0000cd18.bin
0e1b2d01d019cb4e427a75db543ef60996b17d637f76827ebc6bf51b97cb61fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD18 12892 bytes

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