Malicious PDF — malware analysis report

Static analysis result for SHA-256 760daa4a6b79a127…

MALICIOUS

PDF

64.1 KB Created: 2020-08-19 23:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 745fd93764f2e3062979e49ec652dfb6 SHA-1: d43a510df6e6f1ec05ba7ee957b04d513743afae SHA-256: 760daa4a6b79a1272a36c49fc6efb5980716c829c7c188fc47265d97c7da8ab0
174 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, indicating a link farm or phishing attempt. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of these elements strongly suggests an attempt to direct users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.com/pify?keyword=get+your+guide+rome+italy
    • http://kemojix.somedailyjoe.com/uploads/1/3/0/7/130776819/43e6f.pdf
    • http://dipasen.lesmagnoliashotel.com/uploads/1/3/0/9/130969742/094857643.pdf
    • http://wivarunel.clarkhsu.com/uploads/1/3/1/4/131482975/xosuv_sefemixiv_xizejagewasaked_rorizorexa.pdf
    • http://files.bcmgaohio.com/uploads/1/3/0/7/130740429/xubunikuf-jadisiroxeza-memuful-tusotaji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/psoriasis_causas.pdf
    • https://cdn.shopify.com/s/files/1/0444/2315/1783/files/chat_icon_png_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/human_anatomy_book_bd_chaurasia.pdf
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/bibesonezugikadamepu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/funza_lushaka_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/vacuna_antineumoccica.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/bipasha_basu_workout_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/industrial_wastewater_treatment_systems.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/81713100637.pdf
    • https://cdn.shopify.com/s/files/1/0445/6477/5076/files/general_aptitude_test_questions_and_answers_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/ratidajaguxujixifuxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0086/3643/files/gugewojev.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_off0000bd76.bin
89b3d8572146c674fb183e3c754ecaf3c2ed2d4ca3ea3e97e5134515fa46eff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD76 5100 bytes
font_01_sfnt_off0000cec6.bin
f2b468d2c911e9580dd770c625d4797e353346b49e1a1cad1a68027863300a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC6 10836 bytes

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