Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d27b962e35ca2eb…

MALICIOUS

PDF

70.9 KB Created: 2020-08-22 17:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d7e92b8c8238686819edcc7b06815a7 SHA-1: 349d57198d6aea391b9cb88ac101da79dc5e6a15 SHA-256: 8d27b962e35ca2ebdb8b2a57dfc8ff29299874c202a77b693719b3d313938821
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text referencing 'Camila Cabello songs senorita' and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to obscure the final malicious destination.

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.cc/pify?keyword=camila+cabello+songs++senorita
    • http://vuwoj.jenniferwyseart.com/uploads/1/3/0/7/130776023/875571.pdf
    • http://files.kaysfeld.com/uploads/1/3/1/1/131163684/2377567.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/kadawalume.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/86803072412.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/bajibabaluraduwakun.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9432/files/55495281905.pdf
    • https://cdn.shopify.com/s/files/1/0434/6927/5286/files/acting_skills_and_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/cat_980g_operator_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/modilajenopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/50392756357.pdf
    • https://cdn.shopify.com/s/files/1/0428/4055/5687/files/jifepe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c169.bin
b247f47af076845f824b81d1f9bc1f88f01adbbede2dc2c5bbfdf40f51996bff
pdf-font-stream PDF embedded font (sfnt) at offset 0xC169 2940 bytes
font_01_sfnt_off0000cbf1.bin
6bb52e83ce55b93f5ebf0cff7d264e2e09eebcf9c350c56b6656022682009050
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF1 5164 bytes
font_02_sfnt_off0000dd63.bin
6240a7057fcc8a7e3e3cc5bd80b64c7ecfc3a02d74c71918f9b5e27911c015c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD63 16060 bytes