Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d0ec4f3d27e980…

MALICIOUS

PDF

88.2 KB Created: 2020-08-30 07:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad62f2407bd6bbc68be1e86f1860ad82 SHA-1: c12aeb3baa35e51107557cb52fb52d5da54feeed SHA-256: 16d0ec4f3d27e9808bc377a8c6f21868fe3d98543b08292dcc35ef1c9be103bb
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, with one specifically identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous external links suggests an attempt at SEO manipulation or a link farm, potentially to distribute further malicious content or to improve search engine rankings for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=aaaaaa+aaaaaaaaa+aaaaaa+aaaaaa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b8c837_a246bd3c8db64697a47402bef4858f06.pdf
    • https://static.usrfiles.com/ugd/eaf48f_9737830f96ec4819a3b4a33e6222b8e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d2b3070a139414cae34f2523698b6a9.pdf
    • https://static.usrfiles.com/ugd/ca32a8_ec76b7ede5f94d0e8980c543d81c88ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_1047222140094212abc2e0fb59586faf.pdf
    • https://static.usrfiles.com/ugd/724fb5_f12f98f587c34f8aa5891b2a77087301.pdf
    • https://static.usrfiles.com/ugd/b8c837_3edc7497a387403b9bba10a9cfa8e913.pdf
    • https://static.usrfiles.com/ugd/b8c837_4eaf8e5298f744ff9c4905eb23437292.pdf
    • https://static.usrfiles.com/ugd/b8c837_715346d638d14508a09eaaf21faff564.pdf
    • https://static.usrfiles.com/ugd/e1d12c_cb2052c0831e41a985f2089bedae960b.pdf
    • https://static.usrfiles.com/ugd/de60da_bda237cb7af647158c7d99fdbd2236af.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/58845563218.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/88888863248.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/36417906214.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/spider_man_2002_pc_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5576/files/vadumik.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e033.bin
f97602ea7d370574004b5ff4ab6083eaeb15b9162a58d78a0d987ef764be0e67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 6732 bytes
font_01_sfnt_off0000f70d.bin
a17440a7ad1b5d4e8cfa5060f94f53d95d521a582e21e4f21d9f2ec57218735c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70D 3688 bytes
font_02_sfnt_off0001034c.bin
d71f8e9d3bb0cd5200b2849b4ea480802099ba5e55e68beae56a0c39dedeab7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 18364 bytes
font_03_sfnt_off00013b8a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8A 4324 bytes
font_04_sfnt_off00014986.bin
eaead91a7452d70fa73189ac22d6759b14976028f9fce72c68ebff14f98a7e55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14986 1996 bytes

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