Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ed2c4fa8a8370d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-31 19:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a4d484d6124be123bcd64087f9bb7b4 SHA-1: e1fe17ca5ddea9831bf8e454e86d79d2d960dce7 SHA-256: e8ed2c4fa8a8370dc4d6d97cc47c2e3f93ebe5fc5e040260371187e1e25367c6
152 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating a large number of outbound links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=best+answer+for+what+are+your+weaknesses', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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/wix?keyword=best+answer+for+what+are+your+weaknesses
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/4458750194.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/denamezokodiso.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/93735813645.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/tosuvofol.pdf
    • https://static.usrfiles.com/ugd/fb5067_4168835484a8449eabe7dfcba48d7a41.pdf
    • https://static.usrfiles.com/ugd/b8c837_75c628a5be214b1691c4ee4cf0d159f7.pdf
    • https://static.usrfiles.com/ugd/e643da_9756dd514dfd4cc6844b2e43be920c07.pdf
    • https://static.usrfiles.com/ugd/badafb_7ada32d95af34056b55155485a7b026f.pdf
    • https://static.usrfiles.com/ugd/2c608b_166abe402a934ea4913f3625918fed06.pdf
    • https://static.usrfiles.com/ugd/33c377_4f32ef341b5d4b95902e57637470add7.pdf
    • https://static.usrfiles.com/ugd/b8c837_746157b471144a1fb978a10598d5059e.pdf
    • https://static.usrfiles.com/ugd/67e251_c31d2883f85b464faf4032064a3cd600.pdf
    • https://static.usrfiles.com/ugd/57c819_40228d4a25d24c9d8934f4b06d729e1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_660d2f358c4d40c0a4d7c2fd787f50f2.pdf
    • https://static.usrfiles.com/ugd/b85eb0_01c682ee3cfc4694bcf3dc0d952ede88.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000644d.bin
7c5b0dca4d635045ac6262ae12ae47ed5cc2637b19e28bee3390ee5276f37de8
pdf-font-stream PDF embedded font (sfnt) at offset 0x644D 5132 bytes
font_01_sfnt_off000075da.bin
b9bc9400bf4c95e1337348f1040ab9abf778913e310e79615e712ce5963370d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x75DA 10516 bytes