Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7c77c700eea37d…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 19:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f8dc03abb86c6c18fa36dc68ed67d2 SHA-1: 18ca35ac76c17eaa3d04e6af4043e0407eeaa93b SHA-256: 4e7c77c700eea37dda729374c053fa3bc2f5136ea514a1f478531dafd4dabff5
152 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, disguised as a search result for free movie downloads. This suggests a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure itself contained numerous links, characteristic of SEO poisoning or link farm tactics.

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=old+fashioned+film+countdown+free+download+1080p
    • https://static.usrfiles.com/ugd/b8c837_ca5ed1f959594f3d9379b17265b80766.pdf
    • https://static.usrfiles.com/ugd/b8c837_d042635540de4ebbb0ddd2c913928607.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b2644d78f39464fa3d97d8f0891de10.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9e56c4964434c38bf0d2211db45100d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed84d129d6d0410a94a5d885818b2d5d.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_d1b2a23451894998a6d6f6f52b3b4517.pdf
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/production_of_bt_cotton.pdf
    • https://cdn.shopify.com/s/files/1/0438/5731/3957/files/catia_v5_workbook_release_19.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/jusurisupolumawusajijumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3339/3309/files/puvevigi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/70846496464.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/apple_compass_icon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/sozekutokejupejofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0804/files/monemoraxuvifoxik.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_off000050af.bin
3e1a48431c0db99eed9348e7e72442a0b9147e7e8a86accc1557d1d9f29dd73d
pdf-font-stream PDF embedded font (sfnt) at offset 0x50AF 5904 bytes
font_01_sfnt_off000064aa.bin
e8d2c316e17595b272ceb41e5c20ffba8e5ddbe719a542d0174baea2bfd85a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x64AA 13120 bytes