Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb9dab25cca5905…

MALICIOUS

PDF

54.4 KB Created: 2020-08-11 17:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30a7527ee388d215d246bf362e6d9a80 SHA-1: 010baff82a85ca34b1785ecf41f83560d5a1955f SHA-256: abb9dab25cca59058cf4e5ef49a99bc3ee0396af9f1d2ab4052cb3f848b1cb33
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to SEO-optimized PDF documents hosted on platforms like Shopify. The document body, though heavily obfuscated, contains text related to 'restless legs syndrome treatment pdf' and the URL 'https://ttraff.ru/pify?keyword=restless+legs+syndrome+treatment+pdf', indicating a lure to a malicious site disguised as health information.

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=restless+legs+syndrome+treatment+pdf
    • http://files.heathermcclarriephotography.com/uploads/1/3/2/6/132695354/4613565.pdf
    • http://files.mynorthraleightutor.com/uploads/1/3/1/0/131070459/9522092.pdf
    • http://files.makeithappen247365.com/uploads/1/3/0/8/130874143/bazebuvi.pdf
    • http://levedij.stpatricktheatre.org/uploads/1/3/1/4/131452958/digabodo-migoxefilimi-donukiramon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/burnout_syndrome_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/padevegewewenokinesasij.pdf
    • https://cdn.shopify.com/s/files/1/0429/2424/5155/files/98489375238.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/archetypes_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/47547246283.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/vopereguxijonikisuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/7230/4805/files/business_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/81683137981.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/tal_dorei_campaign_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/hypothenar_hammer_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/8595126750.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/14982565584.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_off00009628.bin
e81fe47892308274ac491ae36fa3e3c1487a5cb325cac17bb67c16e171cc8a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9628 5472 bytes
font_01_sfnt_off0000a8b3.bin
f62f97edfe112a6f554e5d8230728af28f8083f4161ad7ca205d917cdc94d735		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B3 10636 bytes

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