Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bb352f5edd755d…

MALICIOUS

PDF

36.1 KB Created: 2020-08-15 10:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f74ddcfa3bdfb274dded35057951c709 SHA-1: 166524bc3843cfefab104755d2f4db3ab1fd08b1 SHA-256: 30bb352f5edd755dec21226a7e80e1c49f588c27c9ae68d3237f58b8efed2668
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=present%20perfect%20continuous%20mixed%20exercises%20pdf'. Another heuristic flagged the document as a PDF SEO link farm due to the mass of external PDF links. The presence of a 'download button' lure further supports the malicious intent.

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/wb?keyword=present%20perfect%20continuous%20mixed%20exercises%20pdf
    • http://files.ofp.cosmo-ufes.org/uploads/1/3/1/8/131872107/ea39f7.pdf
    • http://files.andreatonoli.com/uploads/1/3/0/8/130874238/diranofezoradi.pdf
    • http://files.hartlandseniorcenter.org/uploads/1/3/1/8/131858540/63748.pdf
    • https://cdn.shopify.com/s/files/1/0440/7702/3384/files/repetir_stem_change.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/damefalanuzumafudapopopo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/3rd_conditional_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/minecraft_forge_energy.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/7158977767.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/84248294276.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/98336086542.pdf
    • https://cdn.shopify.com/s/files/1/0432/4471/6199/files/dasezud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4026/files/62972777751.pdf
    • https://cdn.shopify.com/s/files/1/0432/6827/6384/files/xedugakanide.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/kering_sustainability_report.pdf
    • https://cdn.shopify.com/s/files/1/0436/4910/6073/files/kitulosipega.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_off00004efb.bin
e59e74d45bb63e67f35ae437b2f7489f39e192ee18d715fe69b45462067bddd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFB 5128 bytes
font_01_sfnt_off00006053.bin
9146bf4fc522eae255aa2e1e96ae304cfafd2635c969cb797ffef74416b5edbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 10280 bytes