Malicious PDF — malware analysis report

Static analysis result for SHA-256 565b4651d5538f89…

MALICIOUS

PDF

40.2 KB Created: 2020-08-15 16:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a89ba2c3af7808da347de64064db0457 SHA-1: 14004501a0030e18ca21cd308f136bec989c9c01 SHA-256: 565b4651d5538f894b76d128873e2dd5aceb5dc546c729bb993321610f56f9ca
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, disguised with text related to a '2018 nissan frontier shop manual'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the primary URL leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, suggesting a tactic to distribute malicious content or improve search engine ranking for malicious sites. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wb?keyword=2018%20nissan%20frontier%20shop%20manual
    • http://boxikateg.royalenfieldmotorcycles.net/uploads/1/3/0/7/130739169/luripelasodumelikam.pdf
    • http://files.sheshcontractorsandbuilders.com/uploads/1/3/2/7/132740614/safafoxuju_kurune_fareditared.pdf
    • http://files.opencirclehealing.com/uploads/1/3/1/4/131437633/bunadegusunep.pdf
    • https://cdn.shopify.com/s/files/1/0437/7840/8609/files/eeo_1_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/ascii_flip_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/27852915706.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/anomalias_congenitas_del_recien_nacido.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/dixodawo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6687/4269/files/jewojuritixedufosiwuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/bujanonejobax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/kexoronagutojas.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/logic_gates_and_their_truth_tables.pdf
    • https://cdn.shopify.com/s/files/1/0431/4982/0065/files/vemeveg.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_off00005c88.bin
128f2728400e39f32e079bc5324d500fda0d24a4c4da2817f431fa9012f28820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C88 5564 bytes
font_01_sfnt_off00006f3d.bin
79436cc0a257f0f34c6d2eff1a810725413a88db830da5abde993a8076843493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3D 11248 bytes

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