Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff23b45d6b1a68…

MALICIOUS

PDF

47.3 KB Created: 2020-08-12 05:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 252559e1e8f42d7d64b87b65a08d2ed3 SHA-1: 63c895c77a2922001bca4c7e1bde7116813296a5 SHA-256: 65ff23b45d6b1a689d878adad946e2241380f762a41ab04f8854f32c5b4e74a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though partially corrupted, includes text related to a medical condition and the URL for the redirector, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

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=arteritis+de+takayasu+pdf
    • http://rejixusa.hiramring.com/uploads/1/3/0/7/130776688/2ac7ed8.pdf
    • http://files.denvermasktaskforce.com/uploads/1/3/0/9/130969791/fibapesu_musibobebi_wuxoje_xuvoverukine.pdf
    • http://lupawu.boardsandcompany.com/uploads/1/3/0/7/130776873/7870715.pdf
    • http://zulikige.pianomethod.info/uploads/1/3/1/6/131636668/pixubimufudo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4431/5041/files/ruwenunexikuxobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/hyster_forklift_models.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/ielts_speaking_part_3_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91025233068.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/395667921.pdf
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/autocad_architecture_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/vumebumupomonu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2975/6066/files/68715255663.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/53695251316.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/wamolawupivaxas.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/11309916220.pdf
    • https://cdn.shopify.com/s/files/1/0431/0279/7986/files/wemuzixisiwafa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d3c.bin
5f64134176562ff7d78b5c0cd2b4abc7d156e142b82167d383842fa0de8d6f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 4824 bytes
font_01_sfnt_off00007db8.bin
888f845ef7cb9c48f4b993e24c7317085db1b7b242cf2c2ca0e545f7dd53c800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 11212 bytes
font_02_sfnt_off0000a20d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA20D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.