Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f548f4d99f35de8…

MALICIOUS

PDF

46.8 KB Created: 2020-08-12 21:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a9ce62c72945beb30a4d5d7a2084df SHA-1: 338c54af8e9fa1bc8c93b4815f395a331aef2824 SHA-256: 9f548f4d99f35de88fba2e68bd462de689db925e62f30e008bf24824c84528f8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=cbse.+nic+sample+papers+for+class+10+2020+pdf'. This URL is likely used to redirect the user to a malicious site. The document body also contains numerous links, many hosted on cdn.shopify.com, which is flagged as a link farm. The overall pattern suggests a phishing or scam attempt using a seemingly legitimate document to trick users into visiting a malicious URL.

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.cc/pify?keyword=cbse.+nic+sample+papers+for+class+10+2020+pdf
    • http://files.thequiltingretreat.com/uploads/1/3/1/6/131636642/5858083.pdf
    • http://dexidet.aurum-et-argentum.net/uploads/1/3/0/8/130874601/zesipeturomema_namojumifelix_dowileworen.pdf
    • http://files.byronbayhealthycommunication.com.au/uploads/1/3/0/7/130775017/sojapabozeneja.pdf
    • http://zibagapi.lawsenstanley.com/uploads/1/3/1/4/131452903/8393977.pdf
    • https://cdn.shopify.com/s/files/1/0438/1474/8322/files/50571875527.pdf
    • https://cdn.shopify.com/s/files/1/0437/1483/8679/files/answer_set_programming.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/71063537607.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/fikaxoniraviw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9646/5823/files/nicomachean_ethics_david_ross.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/23905161087.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/maniwanaxenej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/rachmaninoff_prelude_in_g_minor_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0057/files/37939806492.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/analysing_likert_scale_data.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/karezulemomopigeli.pdf
    • https://cdn.shopify.com/s/files/1/0429/5639/0559/files/paluse.pdf
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/pavlov_cable_channel_guide.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_off00006645.bin
fd108372be05ecae0ff2b6b8581eb381bf16bead5295f0660e7027afe9bf03b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 5704 bytes
font_01_sfnt_off00007993.bin
2b72cb1fd900991a9d148aa46d1377f5f3403e43b0641bbc875ca9df022b6dcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7993 10352 bytes
font_02_sfnt_off00009cf5.bin
90f0c77c8f52a086b8a8bb864e3b25335c5b65add995715eed47ebad3fe02093
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF5 4444 bytes