Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f3668b8c465a01…

MALICIOUS

PDF

43.7 KB Created: 2020-10-16 06:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8565f7a96c6d305ff17374ce18a0b553 SHA-1: 0eb1a02b687c6ba9b9975d1107e9ebacfa3c125d SHA-256: 67f3668b8c465a017038776b985804fcee3a0eb255a39914165765fa8f3a6893
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/123?keyword=parasites+in+urine+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f870428956cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f86f84b5fbc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f88bb72ab36c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f885103a463c.pdfIn PDF document text
    • https://site-1043130.mozfiles.com/files/1043130/34917817605.pdfIn PDF document text
    • https://site-1038453.mozfiles.com/files/1038453/wajomubagisaloluxar.pdfIn PDF document text
    • https://site-1039380.mozfiles.com/files/1039380/38628906795.pdfIn PDF document text
    • https://site-1040777.mozfiles.com/files/1040777/gagivifakolufegiji.pdfIn PDF document text
    • https://site-1044010.mozfiles.com/files/1044010/23746546648.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/068586e6.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/jebifizoxitarur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/fuwami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2658/0124/files/zadesadisetopekilulib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3697/3975/files/73476901476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4768/1700/files/19304555704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3422/9922/files/15213665439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/lopozudav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4487/1080/files/35479459381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9534/6331/files/razoban.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/0746/6398/files/jejuzodizoxono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7107/9068/files/poboragoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/nozafixofetanisukaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3151/0690/files/71693590507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9484/4587/files/macroeconomics_problem_set_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0939/0238/files/information_technology_processes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 5004 bytes
SHA-256: b634d4671b64c880b9a60559a39f1b6dd9d54eed4ce2d318d113769475871511
font_01_sfnt_off00007fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FFF 10308 bytes
SHA-256: d2a99cfafde5c18bf1693a33ba4891af6d902efd201f9118ca47952097600192

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