Malicious PDF — malware analysis report

Static analysis result for SHA-256 2032136ba4286d07…

MALICIOUS

PDF

43.0 KB Created: 2020-11-02 09:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958198d2b2d7480c77cd03a7bc48fffb SHA-1: 19124042b6e22c64a70c7dd0a41a1ed29d7fda37 SHA-256: 2032136ba4286d074f77acd23a2c4642fae4b1bd778cd29ee3aff41923b5e179
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO manipulation or to host further malicious content. One of the primary links directs to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/123?keyword=new+times+energy+corporation+limited
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5f9b22ebd94ad.pdf
    • https://gobumireg.weebly.com/uploads/1/3/1/3/131383916/texosibeli.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdf
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/80a2dd.pdf
    • https://cdn-cms.f-static.net/uploads/4421336/normal_5f9a6506e6218.pdf
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/kesirawa.pdf
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f907cb9dd819.pdf
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/zuxiroxunedeluz.pdf
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5f9a90e9e9094.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7987/4213/files/ribigulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5938/8316/files/kazanabebalikipefapeb.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004607.bin
1f2eee0ed43458bd875a6e460e4ddb99a64a58becd23444b49ba2841e2cfa6c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4607 3436 bytes
font_01_sfnt_off00005242.bin
a7e7b27b9a21e671b0dfb251a1b9473c1edf4ed36029512c33317760350ad092
pdf-font-stream PDF embedded font (sfnt) at offset 0x5242 5556 bytes
font_02_sfnt_off00006530.bin
09a28f1bbbfc21fbc4788ddcd4fd4e7d50f1ff85a7b3b390b18ea861b8aa6a67
pdf-font-stream PDF embedded font (sfnt) at offset 0x6530 10440 bytes
font_03_sfnt_off0000891c.bin
06343eaa619275e1c102bbacd8a35b7a5f581dd9f1c0f4ff537dfc77a6965a95
pdf-font-stream PDF embedded font (sfnt) at offset 0x891C 16208 bytes