Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be027f616971a07…

MALICIOUS

PDF

44.1 KB Created: 2020-08-18 22:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c56245cdff2c36ca61c2780ece8c8aa SHA-1: d81e35d910878e363e3a4213738102b83048fd6f SHA-256: 5be027f616971a07d543b188d78b73fea228035a8005a52d50ad2564ba81cca1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised with keywords related to 'cctv camera installation tools'. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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.cc/pify?keyword=cctv+camera+installation+tools+pdf
    • http://xunox.bohemianstudios.net/uploads/1/3/1/4/131438500/c277c8e5b33e.pdf
    • http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdf
    • http://files.milkywayenglishretrievers.com/uploads/1/3/1/1/131163836/botavedajovosom-dovedi.pdf
    • http://files.durhamcoc.com/uploads/1/3/0/9/130969220/logabok.pdf
    • http://files.saearkansas.com/uploads/1/3/1/4/131483197/falapuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6307/3181/files/pilivewoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/kukewojik.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/zusiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/estaes_do_ano_em_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0437/2470/1845/files/ielts_writing_task_1_academic_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/5514941466.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/ccrn_practice_questions_with_rationale.pdf
    • https://cdn.shopify.com/s/files/1/0453/6372/4443/files/bent_rule_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/kizagodejuguvo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/28537389830.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e02.bin
0b482f0d1ab6f36137f7f17bb34f5c7063a4e1987e489cd037f6a219155d7749
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5264 bytes
font_01_sfnt_off00007fcf.bin
459d8930bb4f54970295a69502a3ebdc7cbbac73200c63a392764f515e6a64d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCF 10412 bytes