Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9b05bb9077a760…

MALICIOUS

PDF

57.1 KB Created: 2020-08-30 01:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3529b73f29f8b45862a90374d6d86bf3 SHA-1: 1fa95fb97a98fd491408aea6f5855b89c57e35fe SHA-256: ea9b05bb9077a7606542abc56701556333d17eacf311daa605ed422c0e0d3307
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically a URL related to 'lorde melodrama album download'. This suggests a social engineering lure to trick users into clicking the link. The file also contains a large number of embedded links, many pointing to Shopify, which is flagged as a link farm. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to a malicious site.

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.ru/wix?keyword=lorde+melodrama+album+download
    • https://cdn.shopify.com/s/files/1/0437/4354/3450/files/feet_to_cm_conversion_table.pdf
    • https://cdn.shopify.com/s/files/1/0433/3194/4602/files/negevojijebaduforewimivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/point_slope_form_of_a_line.pdf
    • https://cdn.shopify.com/s/files/1/0433/4419/9848/files/goravebefaxurubapofizol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/99355517422.pdf
    • https://static.usrfiles.com/ugd/b8c837_216199422f274026a51ee88479231818.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a52368b596f478d9d461d82e1e04ed9.pdf
    • https://static.usrfiles.com/ugd/353d00_2aaa577737bc410aa77e9db86096ae5c.pdf
    • https://static.usrfiles.com/ugd/217d68_1e67c7ba1bd744d09afe4a473f41f682.pdf
    • https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdf
    • https://static.usrfiles.com/ugd/b8c837_774efeb839ad48a9a590285939142e34.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_off00008889.bin
cdc9a6b5d68c8f0b53a3c1d54f6491fcfcab8b7eac7c3bb855f7d49ab79d8aaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8889 3584 bytes
font_01_sfnt_off00009567.bin
464aa60a82b220ed69c9c4cb277cb81efa93dc4f24bfc9ab4ffff54d383af6ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x9567 4964 bytes
font_02_sfnt_off0000a642.bin
16ce43511ee6d224587a5d1dacfa338b3507e8ec268bf99448d7593d95d22c49
pdf-font-stream PDF embedded font (sfnt) at offset 0xA642 15812 bytes