Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07bf16fae1cab9d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-14 12:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd28a5f90325848be5a20d520e1b4978 SHA-1: 62f3d34682c429ce84cd1383812bdcdcd568f5e6 SHA-256: e07bf16fae1cab9db434e077b6c7bce641675314facf8aba6161ba53268e2fbc
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to Rwandan law and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly indicates maliciousness.

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.com/pify?keyword=igitabo+cy%2527+amategeko+ahana+mu+rwanda+pdf
    • http://zerubina.angiedlee.com/uploads/1/3/1/6/131637254/ziwoziwulojovof.pdf
    • http://files.monkonmolokai.com/uploads/1/3/0/8/130874238/devetixewugugax.pdf
    • http://xewub.davispremedamsa.org/uploads/1/3/0/7/130776760/rusot.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/semekokajovonoponud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/45430042496.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5517/files/fenitejos.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1464/files/nutav.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/6713002305.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/59192989474.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/dell_demention_2350.pdf
    • https://cdn.shopify.com/s/files/1/0432/9340/9438/files/59139348041.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/41711918976.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/teved.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/63866071830.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/woman_who_brings_ruin_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1719/files/mukigebivatawi.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_off00006073.bin
471c562d31c6d52815fc5c610edf5bc0214de06ec97aa40f4d699439bb54ec75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6073 5728 bytes
font_01_sfnt_off000073e9.bin
63fda1c35bf111ad76a06d15d1d28d8f93e32c84c5f3c752141a8dd8b66f0682
pdf-font-stream PDF embedded font (sfnt) at offset 0x73E9 9768 bytes