Malicious PDF — malware analysis report

Static analysis result for SHA-256 2073d8eb3e1ebfd2…

MALICIOUS

PDF

47.8 KB Created: 2020-07-29 18:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd18eef7b53c85fa4b090ab99c0e8416 SHA-1: 7be889128b439c65c5d43281c151b1b808651034 SHA-256: 2073d8eb3e1ebfd2b54ee0fa069cbd42ef0dfdb4b9bc5deaea88baeb773a4cdb
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or redirection scheme designed to lead users to malicious content. No scripts were extracted from this sample.

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=catholic+prayers+pdf
    • http://files.countyparkfriends.org/uploads/1/3/0/8/130814279/zobisulit_selitiga_sojinotavom.pdf
    • http://files.flipmyfloridayard.com/uploads/1/3/1/4/131408209/cf223b5b.pdf
    • http://files.tnt60miledivas.com/uploads/1/3/1/4/131407047/6222686.pdf
    • http://files.centralpolicestation.org/uploads/1/3/1/4/131437538/bolitanafediwivupo.pdf
    • http://files.artographicexplorations.com/uploads/1/3/1/8/131871677/4499f.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/60299181036.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/4729434684.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/magemopewo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/87357010221.pdf
    • https://cdn.shopify.com/s/files/1/0436/6509/6857/files/vigubesozulubut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/29659454714.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/38438870342.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/9063229664.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/jogiledovigegolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/wibikanaxakow.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_off00007e3b.bin
c8fc65269950d1cbf3cdeade4d807a8a9fbc2a61fb138e9acdac6e82267ec6d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3B 5048 bytes
font_01_sfnt_off00008f87.bin
8f0039f1f23b38f6341b96f986618e3443be1d679e3a393b1532d1791fa9f9b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F87 10308 bytes