Malicious PDF — malware analysis report

Static analysis result for SHA-256 e508816e2ad4db8b…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 01:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fc1ffa5c6fb60f279c1b5aa836243dd SHA-1: 81b79a9a0073fd604ea219da4b74391590190faa SHA-256: e508816e2ad4db8bc08f9c968ea22d2b80e62455f7fb0adc6ebc5a2355e0f948
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=buried+alive+tim+matheson+movie, is flagged as a malicious redirector. The document body also contains this URL and numerous other links hosted on cdn.shopify.com, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, supporting the attack pattern of luring users to malicious infrastructure.

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=buried+alive+tim+matheson+movie
    • http://files.swe-pnw.org/uploads/1/3/1/6/131606094/liniteburem_pivozolo_matipejituga.pdf
    • http://files.northwestclarefamilyresourcecentre.com/uploads/1/3/0/8/130874647/c5394c9.pdf
    • http://files.grandmaceilshouse.com/uploads/1/3/1/4/131408529/92347f03614c5.pdf
    • http://bimabilo.kibafreemanart.com/uploads/1/3/1/4/131437508/vigawejurobenu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5974/files/69775593301.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/vaxanuxexakuratotari.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/converting_among_metric_units_worksheet_answers_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/71166132608.pdf
    • https://cdn.shopify.com/s/files/1/0448/1885/8146/files/peter_pan_cuento_corto_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0431/5987/9841/files/gazijazuvepexex.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/79724451029.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/beclomethasone_dipropionate_formoterol_fumarate_and_glycopyrronium_bromide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/juxinusa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/php_rename_files.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/energias_renovables_peru.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/dasivo.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_off00006db1.bin
248a7b0c0aa8e791a2bee6b06cf2f30b72a11898af13e5f60e0af5466bf1eab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB1 5176 bytes
font_01_sfnt_off00007f27.bin
78d31c0f019aa07cfe52ddfc181cb42896b14b8ed954395efe8bce760e1e19ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F27 10260 bytes

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