Malicious PDF — malware analysis report

Static analysis result for SHA-256 656ebda3fdbb50d8…

MALICIOUS

PDF

45.8 KB Created: 2020-08-15 03:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01ffb8f16eb42cc5afeb447ac6472ee SHA-1: 230197ede66d7f3dc67e4cba8d463df7e4f9b203 SHA-256: 656ebda3fdbb50d8f102ad79115da306d458cf5c3b675e137014f49e26ae5848
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a movie download, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, many pointing to benign Shopify PDFs, suggests a link farm used to obscure the malicious destination. The primary malicious IOC is the ttraff.cc redirector.

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=bulletproof+monk+2+full+movie
    • http://files.nchomeremodel.com/uploads/1/3/0/8/130874042/togijigeboxupev_sobuzo_tirinebeja_mazawe.pdf
    • http://files.dannywindsor.com/uploads/1/3/2/6/132681325/toroduj.pdf
    • http://zozunek.adamjchong.com/uploads/1/3/2/6/132695924/9493b8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/characterization_of_nanoparticles_intended_for_drug_delivery.pdf
    • https://cdn.shopify.com/s/files/1/0436/3426/2169/files/73488590455.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/policrestos_homeopatia.pdf
    • https://cdn.shopify.com/s/files/1/0447/3815/0549/files/destination_a2_vk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4198/0567/files/lenumifojo.pdf
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/wulelukorusolawa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/40472200573.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/latex_beamer_title_page_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/ga_form_500_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/pevatigufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/goloxelazitupaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8005/files/xasazama.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/brainwashed_elisa_oras.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000675a.bin
9ce25b4dc0d332d1a465818a4a1c192b07cba50e318fefe07c03699bc7131909		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675A 4844 bytes
font_01_sfnt_off000077c8.bin
b8a30e9a8c239c639982df91949f1d42f33f689e4d7c16d9182bd2c46f9ae81f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10652 bytes
font_02_sfnt_off00009c2f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2F 4324 bytes

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