Malicious PDF — malware analysis report

Static analysis result for SHA-256 624d11b88265b492…

MALICIOUS

PDF

40.7 KB Created: 2020-08-01 04:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a73e2e3356d8cefe8f43e58c64850eb SHA-1: c613723392bf78963d18208db9d20788b64dfca6 SHA-256: 624d11b88265b49225469cad8a01b960d7d3c23175e68b2d788d5dba49ea3d86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=character+in+a+beatles+song'. This suggests the document is designed to lure users to malicious sites, likely as part of a phishing or scam campaign.

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.com/pify?keyword=character+in+a+beatles+song
    • http://files.fasttraxathleticclub.com/uploads/1/3/1/4/131407823/3bbed2daacba.pdf
    • http://files.chaosdragonboats.com/uploads/1/3/0/8/130814216/julel_furujuxuxu.pdf
    • http://files.bestwoodmyanmar.com/uploads/1/3/1/4/131453998/8706778bf0c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/juvinajepabane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/91586810904.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/dapilonuwigopenus.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/41406744730.pdf
    • https://cdn.shopify.com/s/files/1/0435/6128/7839/files/rosewonaputedakubevefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/4036863675.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/lakavigowazujozibevenasi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2756/1634/files/15588079241.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/lijoduxabovu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/xefirowivixujimarufivamo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1910/6466/files/kunurebun.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_off0000627b.bin
1fb28f100a0af5dae4c6f18cbc19422cd35e2a1e8792460f83805a6f65418f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 5104 bytes
font_01_sfnt_off000073cc.bin
ec5240297da610e42bf90cae80250760cfeb93ae8518fe3c0405d474837850ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CC 10044 bytes