Malicious PDF — malware analysis report

Static analysis result for SHA-256 f651b6c3053fd012…

MALICIOUS

PDF

51.1 KB Created: 2020-09-02 03:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6ee0c881605ecedd176a8d87598e799 SHA-1: 3a849cf58ff83c7c5893808b69785247f49139a1 SHA-256: f651b6c3053fd012b4edf8f143e2665046384484cef44742dd33eacbaf2645a1
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, likely to trick users into downloading malware. The document body and embedded links suggest a lure related to a game mod. The presence of a link farm and a redirector points to a phishing or malware distribution attempt.

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=my+tom+bubble+shooter+mod+apk
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/rujuxugezen.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/1424914318.pdf
    • https://cdn.shopify.com/s/files/1/0469/4831/9393/files/42262206858.pdf
    • https://cdn.shopify.com/s/files/1/0462/2680/0791/files/85620249798.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/90327548384.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/3888521451.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pafinekumukomotutawewokab.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/gupor.pdf
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/93884158452.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3935/files/51425308334.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_d12ab11668b449bc91330f65ef33443b.pdf
    • https://static.usrfiles.com/ugd/07e02c_ed4cafbff92f4f43bf06f5e72b308f9f.pdf
    • https://static.usrfiles.com/ugd/8ab72e_1f92abe63f0240a19fa53d1d27e904ac.pdf
    • https://static.usrfiles.com/ugd/7598fa_4d1af4e38e564ce2a14c03733b44b279.pdf
    • https://static.usrfiles.com/ugd/91e123_5b06d68084c240219bb93ff8d2cad2a9.pdf
    • https://static.usrfiles.com/ugd/cdb50c_caf46ffb342f4daa8e2b445075f8fe65.pdf
    • https://static.usrfiles.com/ugd/e3834b_1aa88efc7d2d4355ab5b14f4df5333a2.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_off0000733b.bin
ff4f6ac6eb8f63904a229a4852b7d8c856e8fa615a51241ec33c28658cea046c
pdf-font-stream PDF embedded font (sfnt) at offset 0x733B 5508 bytes
font_01_sfnt_off000085d3.bin
8d2399df6ca76cc1cf8cd9354621657117440d9f7e03520e340248d5074b7ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D3 10468 bytes
font_02_sfnt_off0000a9f5.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F5 16092 bytes