Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e8d795ed618e6…

MALICIOUS

PDF

59.2 KB Created: 2020-08-24 14:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a62dabcb2cae8ad64dc66269946b27d SHA-1: d759d2e68118756edb6270d9ac2a6d25471f81ab SHA-256: 722e8d795ed618e65116b0571886332c6e8c87cee30099e01ca52855f231808b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text and URLs consistent with an advance-fee scam, aiming to trick users into clicking malicious links. The presence of a link farm and a malicious redirector suggests an attempt to lead users to potentially harmful content or phishing sites.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=historical+fiction+picture+books+pdf
    • http://kopumofex.weinclusive.com.au/uploads/1/3/1/8/131856214/nitepako.pdf
    • http://files.artistcafeutica.com/uploads/1/3/0/9/130969659/74de3e6.pdf
    • http://files.deft-touch.com/uploads/1/3/2/7/132710763/490733.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7084/7131/files/lagu_chrisye_full_album_80an.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2341/files/nujokazozalekoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/80896445670.pdf
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/13082988294.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/54756931097.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/66559186919.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/jujopigefazafuviworun.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/bearing_design_data_book.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_off0000ab72.bin
78502988248480fed70431019984f5d3b9a476faf43a1be7b3a0f4920252ee89
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB72 5316 bytes
font_01_sfnt_off0000bd85.bin
c049110b7453f7bf45fba6675d2c0f0bcd0d167f24007582a891ec70bb610b77
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD85 10156 bytes