Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef67ad8eb072901c…

MALICIOUS

PDF

35.6 KB Created: 2020-08-06 06:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ac9e0ebdadc8a11a7ec67f264e7c08 SHA-1: 27762bbd5a743493d6265a60bf73844b8baf4e26 SHA-256: ef67ad8eb072901cc2a93e87dc62c1c054643415cafd07ab59eeaf04de40037f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to a redirector service. The ML classifier and critical heuristics indicate maliciousness, strongly suggesting this PDF is designed to lure users to malicious sites by appearing to offer educational content. The primary malicious URL identified is ttraff.ru, which is known for redirecting 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.ru/pify?keyword=physical+science+textbook+pdf+grade+12
    • http://files.wanderlustnwcatering.com/uploads/1/3/1/4/131452800/dimawavabobuxida.pdf
    • http://files.karrynargus.com/uploads/1/3/1/4/131438137/2320517.pdf
    • http://files.michellejnettles.com/uploads/1/3/1/8/131871762/gemifub.pdf
    • http://files.johngreinerferrisstudio.com/uploads/1/3/2/8/132815343/6302219.pdf
    • http://files.essenceofbeautydublin.com/uploads/1/3/1/6/131637057/9362341.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/writing_a_job_application_letter.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/rugodelem.pdf
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/weleje.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/bopiwuturixuxip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/27872501340.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/befevavusaxigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/kuvojotatalitaxakigajib.pdf
    • https://cdn.shopify.com/s/files/1/0438/5013/7760/files/laravel_password_reset.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/crash_jerry_spinelli.pdf
    • https://cdn.shopify.com/s/files/1/0439/4542/7102/files/tipowapiveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6314/files/interview_zen_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/92984947795.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4585/files/venowozakitov.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c3d.bin
74541c3d01c80658316e1bf470dc1476c687c1dfb041a425503208142f2c575e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C3D 5976 bytes
font_01_sfnt_off000060a1.bin
6d25a0f35694bf3e7fb0b3ac08240ae06c3f7e18caa6bee43056a5bd85402487		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A1 9596 bytes

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