Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7027b2a660c116…

MALICIOUS

PDF

52.4 KB Created: 2020-08-08 11:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b8cacad598636fbccceba4d29818b3e SHA-1: c1bf9f08fb49810d9c4fcf1e8909d9f31538d9bc SHA-256: 2d7027b2a660c116d8bf2ad5fdb3e5517b7b4c81ace2842664cc9009a6921881
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that is also present in the heuristics, suggesting a lure related to 'Archimedes principle formula pdf'. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to obscure the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=archimedes+principle+formula+pdf
    • http://files.narinesookram.com/uploads/1/3/0/8/130874038/1564370.pdf
    • http://vemateza.aspe-dc.org/uploads/1/3/1/4/131437987/8162349.pdf
    • http://files.bickleighvalevillage.com.au/uploads/1/3/0/9/130969054/99caa2.pdf
    • http://files.andrewwarnerdogtraining.com/uploads/1/3/1/0/131070846/fatawu_xapub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/litajokeguxomimis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/89445956138.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0430/5793/8581/files/xijomojepufobeto.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/50301010305.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/48157794848.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/english_speaking_course_free_download_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/jamulupadobejinipujuzibud.pdf
    • https://cdn.shopify.com/s/files/1/0437/5907/5477/files/nanadebekole.pdf
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/autocad_2015_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/2186/7930/files/gifamupibide.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_off000076d3.bin
ed3a9cdea74e0e47811a695dcdb13d2464910fcb435559a4e289531f0b98634a
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D3 5384 bytes
font_01_sfnt_off000088fc.bin
0eeb4c8346fa33fc3f23d2ae9f39137e1ef422ecd364959b5a401e32d678fcb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 11752 bytes
font_02_sfnt_off0000af9b.bin
ccd0ea095085b9379100d4de0d13d045157d8501f46cd3db2ef5c00475687e02
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9B 16088 bytes