Malicious PDF — malware analysis report

Static analysis result for SHA-256 1175a9c53aaec951…

MALICIOUS

PDF

57.4 KB Created: 2020-08-08 19:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1de7b79718ac57eb681a4c63cc76e50d SHA-1: f05ea87084d3fd826dc353464ab5472edb66f9e7 SHA-256: 1175a9c53aaec9513d366d69b26eca2c788bb1dda2f7f509ebfe25080c450e08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and contains a large number of external links, indicating a link farm. One of these links directs to known malicious redirector infrastructure, suggesting an attempt to lead the user to a harmful site. The document body contains obfuscated text and a URL that appears to be part of the link farm.

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=eucalyptus+camaldulensis+pdf
    • http://files.spartanburgscottishrite.com/uploads/1/3/1/4/131453188/0f0f46f4e428ef0.pdf
    • http://zobitum.crystalsentwined.com/uploads/1/3/1/3/131379732/nujavo_zepezedulafeg_wedese.pdf
    • http://files.j2theson.com/uploads/1/3/1/4/131407315/e3ec002ad561.pdf
    • http://files.boecc.org/uploads/1/3/2/7/132740511/zovak.pdf
    • http://files.hiddencovelodge.com/uploads/1/3/1/4/131438474/edf62d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/96247493345.pdf
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/sunbeam_bread_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2509/7126/files/53414719764.pdf
    • https://cdn.shopify.com/s/files/1/0440/5769/0262/files/68806924094.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/lobowoxaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/5733/8776/files/benefits_of_effective_communication.pdf
    • https://cdn.shopify.com/s/files/1/0432/7119/2732/files/watemefesovegukutafexebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6432/8345/files/calculating_net_present_value.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/69964862369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/body_beast_lean_schedule.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_off0000a0d8.bin
ca7fce91ef53c4649743a6725b248bb43f548b9d3539d26a5b72eaed874aac69
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0D8 5264 bytes
font_01_sfnt_off0000b2c5.bin
ba7df4090fd545567fdbbf1c24f9a9dc155fb0e3ed0aa9824a62e180357d12c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C5 11512 bytes