Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11fe42843eba19f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 18:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b1d717e9f9fae6a9d2e6c5b144ebe65 SHA-1: 55bdfdaa5903c109e88b382cf533654151873f62 SHA-256: c11fe42843eba19f43ffc6b95e6602d3d5f23d39a646826ea7457da1db4be514
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector. The document body text, though heavily obfuscated, contains the string '4liker apk free old version' and the malicious URL, suggesting a lure for potentially unwanted software or further malicious content. The presence of numerous external links indicates an attempt to manipulate search engine results or distribute content widely.

Heuristics 3

  • 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.
  • 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=4liker+apk+free++old+version
    • http://files.correctplan.info/uploads/1/3/0/8/130874620/gewojexivezanidoneto.pdf
    • http://susatowa.piperpaul.co.za/uploads/1/3/0/7/130775164/dixutebo.pdf
    • http://pezadotuk.aidenlee.net/uploads/1/3/2/8/132815176/8234216.pdf
    • http://tijex.augustiniana.net/uploads/1/3/2/3/132303307/e08d62be5d7.pdf
    • http://sabeso.just-us-justice.com/uploads/1/3/2/8/132815787/zurenorabetejijola.pdf
    • https://cdn.shopify.com/s/files/1/0434/7917/1222/files/occupational_safety_and_health_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/solid_design_principles_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/babeburufixigaruf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2417/8600/files/rilido.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/ata_chapter_24.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9347/files/innumeracy_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5222/files/94587709116.pdf
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/xipemodibikuwetedeneba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1083/files/23813670024.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_off00005941.bin
c61961794b501fb07a6e6cf1b438ac5fbb3b67aeefff72c55cb0295ade52fa8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5941 4860 bytes
font_01_sfnt_off000069cd.bin
ade69d9a91443784e6717aa3bcf7d79cd2ebc282ab9fd4ff5f63c5898b0a7d06
pdf-font-stream PDF embedded font (sfnt) at offset 0x69CD 10780 bytes
font_02_sfnt_off00008e67.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E67 4324 bytes