Malicious PDF — malware analysis report

Static analysis result for SHA-256 074353b4d3f3badf…

MALICIOUS

PDF

34.7 KB Created: 2020-11-07 02:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 80a564b4e162800f4e73807f4de38573 SHA-1: 0d57bb368faabf1a5a7b3a822904f310629d5cef SHA-256: 074353b4d3f3badf86c74b56c01fe7bf5c0f1adea0eefd8a2fbf43dcf7c17286
182 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to multiple external websites, one of which is identified as a malicious redirector. The embedded URLs, such as 'https://ggtraff.ru/aws?keyword=brother+ls+2125+sewing+machine+manual', are likely intended to lead victims to malicious content or phishing sites. The ML classifier strongly indicates malicious intent, and the presence of numerous links points towards a SEO poisoning or traffic redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?keyword=brother+ls+2125+sewing+machine+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5fa1aec4b5590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5f9c6fb1769e7.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/batezumezesaragimil.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/daborafokutudo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/welanep.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/55253859274.pdfIn PDF document text
    • https://gezafetino.files.wordpress.com/2020/11/ethnic_conflict_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/strawberry_festival_scholarship.pdfIn PDF document text
    • https://gukoxawe.files.wordpress.com/2020/11/35097490628.pdfIn PDF document text
    • https://kimidajitigu.files.wordpress.com/2020/11/misinibugizuzekasujezewi.pdfIn 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_off00005bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC5 5664 bytes
SHA-256: 2c32b52c45d69b525ece932fcab3a839e9a35086c6160d202a2f0905210035b3
font_01_sfnt_off00006ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF9 9936 bytes
SHA-256: a57be681b449b56260ee4228a4504cdfc6dec4a4ef6ebd5e1db1f53a3d016345