Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1131a1e65585b11…

MALICIOUS

PDF

120.5 KB Created: 2020-08-14 15:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce451e380e14c9984239c9b14119c96b SHA-1: 272c52c31f9b82c63f58a15cdb7d355f5fdc7922 SHA-256: d1131a1e65585b118713eb3ddef34ea2241965f4d3db22a03bb1ee439da08a7c
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF_SEO_LINK_FARM heuristic further suggests a large number of outbound links, many hosted on Shopify, likely to manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=mkdu4221+pendidikan+agama+islam+pdf', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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=mkdu4221+pendidikan+agama+islam+pdf
    • http://masebemuv.rlsphotography.ca/uploads/1/3/1/6/131606365/9746319.pdf
    • http://files.antoniosajid.com/uploads/1/3/0/8/130814682/jogojafovewerox_zunezuxotejo.pdf
    • http://files.trancalvin.com/uploads/1/3/1/0/131071137/baxexugimib.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/8957293361.pdf
    • https://cdn.shopify.com/s/files/1/0435/7842/5507/files/biblia_latinoamericana_san_pablo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/57147385426.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/rujetarus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/jifakuvuzizizopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/buwewes.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/special_characters_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1437/files/define_internet_intranet_and_extranet.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_off00019b2d.bin
c283d0cb3c7ae8daaee527b8c0cb1ab61dfe54fbc2e545459e7a21610c5d30f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B2D 5608 bytes
font_01_sfnt_off0001ae4b.bin
4296a0ce4f714d1da39f787d8bcad6774493bd15cc3cb685c37b9863fac7673f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE4B 11296 bytes