Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cea23639aa3f93…

MALICIOUS

PDF

53.0 KB Created: 2020-08-18 23:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc82b1f557edf72cddcaca5a818bede4 SHA-1: 184b20fdd01b4f6d4c7fc36855bd6a44fab56863 SHA-256: e0cea23639aa3f933f70fa7ef33ec372f82225d979bffeb737a0cf10b4ee820d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=android+13+vs+ssj+goku'. This indicates the document is designed to lure users to a potentially harmful website. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further supporting the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=android+13+vs+ssj+goku
    • http://files.lovemehemp.com/uploads/1/3/1/6/131636697/5453001.pdf
    • http://donom.kchcapital.com/uploads/1/3/0/7/130738799/4474174.pdf
    • http://files.constantpodcast.com/uploads/1/3/1/8/131856827/pafemunilov_dununumo_mopemosutirusa_limevasaleragip.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/rolirejejes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/pejurudubiden.pdf
    • https://cdn.shopify.com/s/files/1/0437/6520/3093/files/fedex_release_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuvuwagel.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/susexod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/83665144328.pdf
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/15717707133.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/sarepozupekejuxori.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_off00007dbf.bin
75239b46a6e91e42d5216d901ad367c22f4ee0816cb45d250ec99fb6ce62d70e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBF 6088 bytes
font_01_sfnt_off000092d3.bin
47316f3fc21698ea34027d2306e1093e3fb1c12e1f8e32031b44021ac639ea5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x92D3 5156 bytes
font_02_sfnt_off0000a486.bin
164834d6a8c952c0274cea2f46d61351bd3a6828fc506dd36d0d05c6356d5579
pdf-font-stream PDF embedded font (sfnt) at offset 0xA486 10192 bytes