Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8ea4345b9692be3…

MALICIOUS

PDF

51.2 KB Created: 2020-08-23 09:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb86112c985a0622afebf4e20a9d7112 SHA-1: 7ded88a2ce299f94d9ae70184611b1acd1a0939a SHA-256: c8ea4345b9692be3b580afb9cd50f247e651a8b99e6a62a6693f1af88cbdeb1e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.cc/pify?keyword=playing+with+fire+piano+sheet', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites through a series of redirects, likely for phishing or malware distribution.

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=playing+with+fire+piano+sheet
    • http://files.latorreholidays.com/uploads/1/3/2/6/132695525/3323416.pdf
    • http://files.behindthebadgenm.org/uploads/1/3/0/7/130776749/3082387.pdf
    • https://cdn.shopify.com/s/files/1/0435/5653/6479/files/83937690775.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9651/files/estadios_del_cancer_de_estomago.pdf
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/24487637897.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/lavexebisiv.pdf
    • https://cdn.shopify.com/s/files/1/0454/5675/2792/files/kumulagedak.pdf
    • https://cdn.shopify.com/s/files/1/0433/6661/3141/files/latiwejud.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/15515449531.pdf
    • https://cdn.shopify.com/s/files/1/0454/3709/1998/files/horizontal_analysis_of_financial_statements_for_3_years.pdf
    • https://cdn.shopify.com/s/files/1/0436/7250/2425/files/lomevonusujedevizefedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007600.bin
38532385b6e5fca5c0b76791907a9c2ba7e1a315a9a922d5e5c5bfb88670172e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 5360 bytes
font_01_sfnt_off00008845.bin
40fdd8b0f2adfcd1901121da02a8cd3e89f9b8dcd3e8af49b9b90394e4fd9124
pdf-font-stream PDF embedded font (sfnt) at offset 0x8845 10156 bytes
font_02_sfnt_off0000ab2f.bin
9cfb948b915a4694feeb7f8719f2b65905b0a58e2ed918074a610570d07e7249
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2F 16100 bytes