Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efd07dadd3f5604…

MALICIOUS

PDF

43.6 KB Created: 2020-08-01 06:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cea1353747ff8f0d05c5ffe61995c34 SHA-1: 5131566d4c6538c8f97668871647505a14cc8222 SHA-256: 0efd07dadd3f5604e30b761ffa65b9972550dc84daae7f0cf796e1955d4b4d18
194 Risk Score

Malware Insights

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

The PDF contains a lure to execute commands via the clipboard, suggesting an attempt to download and run a second-stage payload. It also hosts a large number of external PDF links, many pointing to Shopify, which is a common tactic for SEO link farms and potentially distributing malicious content. The presence of a malicious redirector URL further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=hosts+file+windows+10
    • http://files.rodeotru.com/uploads/1/3/1/6/131607053/gefosam.pdf
    • http://files.cateyosborne.com/uploads/1/3/1/0/131070618/getajuneretaz-rovinalum-davuzewed.pdf
    • http://files.fineartssociety.net/uploads/1/3/1/1/131163691/6116307.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/gomevebaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/20152897114.pdf
    • https://cdn.shopify.com/s/files/1/0432/9229/5332/files/82863138986.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0876/files/42126257867.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/86569642740.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/41374541575.pdf
    • https://cdn.shopify.com/s/files/1/0431/8602/8708/files/conda_install_psycopg2.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/71186064625.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/dijunuxikerofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/10248955549.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.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_off00006d62.bin
08f755c5ee9ee169c7849481293945f66eb32d6151b2191f8fe81837c0a1e185
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D62 4840 bytes
font_01_sfnt_off00007e08.bin
84ebfd6e164e310652ee94008c1c17c00a3e37323fa7584558e5a9204e35ad14
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E08 10648 bytes