Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95177aacfba7a61…

MALICIOUS

PDF

36.2 KB Created: 2020-09-13 07:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5ef4527f3ee723b47d8d056d4af5c0a3 SHA-1: a7ddb7b69ca195fa86be4cc8bc078c89f7789335 SHA-256: d95177aacfba7a616c6bc0b4db11e7763034707ade000a469eea609da9bf7a9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, characteristic of a link farm, with at least one link directing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The presence of numerous external links suggests an attempt to lure users to malicious or compromised websites.

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/pify?keyword=ionic+solid+examples In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/e7e4a0_4d6d8a0db86d49f6a5f3276f6b2a5fc3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/83b1b3_24aeb694ffc541cf9133a49986fdecfd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/96a426_ee2c4dc5481a4d20853e0627620c026f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4dbf3f_714ce7d8649a4ccdabcd21614aaf5e99.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b48b60_fe8ed48ee6b44a7395e3838e9eabadb2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aaaf79_9968c2a005464d2f96c2ed1d84a40b23.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/34e21e_d1253f7c36db4bc3802b79101850b018.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b98abb_4a710b4ed01f48e29726bed665ccaf8a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b28561_dc3ea66f1068427ea832bba63897a4a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/54bec1_7c304d1f55a446c99096dbb9b41dc41c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/65d6f7_7e72390058b546668ec98b8361186fd2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4fea5c_c48605f035994b92b03c056ab105ccf0.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000524f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x524F 5128 bytes
SHA-256: e0f01b52addaecad33b6f133920cf1215111158b9ca21b356f18177384d44f4c
font_01_sfnt_off000063b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B0 9624 bytes
SHA-256: f056dc27432a2ba4dd7cf33bbb819d8ec8ab97329cf8399c1483e85a983e9001

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