Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f1a256feaf03cf…

MALICIOUS

PDF

100.7 KB Created: 2020-08-07 08:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ec5bed81b39beecba9937aa32c35fe7 SHA-1: 52eae5de226c26ed0ee8de1725e1aa0b52808b40 SHA-256: 39f1a256feaf03cfea729db88f303c628428b0b39f0af0172e734a8a813db779
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=attitudes+to+language+garrett+pdf'. This suggests the document is designed to lead users to malicious content. The presence of multiple embedded URLs and the ML classifier flagging the PDF as malicious further support this assessment. No scripts were extracted, limiting the ability to determine specific execution methods.

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=attitudes+to+language+garrett+pdf
    • http://files.nssupply.com/uploads/1/3/2/6/132681863/fidazakelaro.pdf
    • http://files.waterbrooktomah.org/uploads/1/3/1/3/131398148/98745beb469.pdf
    • http://files.gislweb.info/uploads/1/3/2/7/132712302/lonufuwexorada_foleg_vixawiwore_mejopuvidu.pdf
    • http://jokorit.norvaqatar.com/uploads/1/3/1/6/131606289/2689839.pdf
    • https://cdn.shopify.com/s/files/1/0428/8335/0687/files/causes_of_indoor_air_pollution.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/cengage_organic_chemistry_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/godafebejuxopupifas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/atmosfera_estandar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/65232382268.pdf
    • https://cdn.shopify.com/s/files/1/0438/4453/4429/files/78974100908.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/58195123470.pdf
    • https://cdn.shopify.com/s/files/1/0430/5407/1957/files/zosorobejewujos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/zavovikabogimomuwisopa.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/72438144428.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/98480213567.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/82901626345.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/takovelukuxiwodufakevozo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4664/1570/files/36618865793.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_off00014ed2.bin
e427377bd8aa89693b8b3a019cb7b273fb2a4f01ce61f9521684d53d4224ea5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED2 5200 bytes
font_01_sfnt_off00016093.bin
2f5ba11fd1440be223d5add7139c9105ca8fe305824aa3600c9233b2e4dc9698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16093 10196 bytes

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