Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5f4b21048d9a91…

MALICIOUS

PDF

36.7 KB Created: 2020-08-23 22:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b84f7ef424837fa0f654272ff95ad5eb SHA-1: f7dfd7da9410ab657c1772fa86017c978aa5c393 SHA-256: ae5f4b21048d9a9189856f16903f3131d2351c462b1bd7206bfc505c01840967
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a prominent one leading to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'goudy font free' and the 'wkhtmltopdf' tool, suggesting a lure to download a font. The presence of a malicious redirector link strongly indicates a phishing or social engineering attack aimed at directing users to a harmful site.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=goudy+font+free
    • http://files.ramseybaptist.com/uploads/1/3/1/4/131483019/fd1c75.pdf
    • http://gazesir.friesenfruits.com/uploads/1/3/1/4/131437987/vorurojovemud_wegagejoruk_rozelulo.pdf
    • http://ropavotuw.internetadvert.net/uploads/1/3/2/8/132814930/jebaluvawi.pdf
    • http://files.dirtypawprintsaussies.com/uploads/1/3/2/7/132740214/nopajafubumel.pdf
    • https://cdn.shopify.com/s/files/1/0436/6693/1865/files/52031091335.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/gupatogimajad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/vodejitalojobubobux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/vuvenoxav.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6216/files/kibito.pdf
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/28514094274.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/pumesesafiwobenun.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/12667768194.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/definicion_de_diabetes_mellitus_tipo_2_segun_la_oms.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/99454270170.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/denixalefig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1949/9682/files/dowry_kalyanam_movie.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/gothic_architecture_history.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_off0000541d.bin
57268da7df99112a7e88f47799c18a599c6920dc92b8f373413ea5c0f83c4259
pdf-font-stream PDF embedded font (sfnt) at offset 0x541D 4616 bytes
font_01_sfnt_off000063eb.bin
6d03abcd5ba34be951ed5274fe9fce282e7cbb3e5a449d17a044dbb8ead7d32c
pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 10040 bytes