Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e4c28627a812a1…

MALICIOUS

PDF

40.8 KB Created: 2020-09-07 16:39:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1978ed432ef51365c1c28ccb9d20645f SHA-1: 69c2ebde9b1a16697430eb0d40b8d60a22bde183 SHA-256: c9e4c28627a812a171224ef72fcc8231b189c66484e09fc09c0c3e7ae3bc1656
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.link/wix?keyword=hello+brother+songs+in+tamil+free', is flagged as malicious. This indicates a likely attempt to lure users to malicious sites, potentially for phishing or malware delivery. 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.link/wix?keyword=hello+brother+songs+in+tamil+free
    • https://static.usrfiles.com/ugd/a58b01_4d2b03ff4ad34ce2bbf5ad48c28b3e14.pdf
    • https://static.usrfiles.com/ugd/585b1d_8f0ad79fe37e48f5983e30c58e0d4b83.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_d2ee76dc1dd1495993e1b0eba4c3648d.pdf
    • https://static.usrfiles.com/ugd/eddc50_c58a9bc7544346fea58888f2ba485c39.pdf
    • https://static.usrfiles.com/ugd/828753_8ea34cd8166b4dd291e72998b71602fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b4cf20ed2634caabd44551752bf29df.pdf
    • https://static.usrfiles.com/ugd/eaf48f_fb8c15fae4c045caa5dd36522a352c16.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/revobovimonepifuxek.pdf
    • https://cdn.shopify.com/s/files/1/0457/4425/9228/files/family_business_succession_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/5935/5558/files/batilijanilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9817/files/46625193377.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/amt_informatics_olympiad.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/18615720882.pdf
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/91451564300.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/nubefozorujifunapigevo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/vilulu.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_off00006148.bin
e04748cd9eceacbcf65b28ef7d84efde12286e961fbfeae718eb2d8ad29bf368
pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 5280 bytes
font_01_sfnt_off00007311.bin
3ea2aca96b94fc6c6009a46eb99bc10bfc206a1469fc46677362f30719ce28f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 10308 bytes