Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae7d5ca9ae9c201…

MALICIOUS

PDF

51.7 KB Created: 2020-08-28 20:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76307b9eaadafc8f653b958ca3214756 SHA-1: cc52098445c4feb3030945a64e142bafd5a65aa8 SHA-256: 0ae7d5ca9ae9c2015e1f56e4b4147ffbee9c0742e8282a3fb2a6aab8c378451c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=sony+mhc-ex9av+user+manual'. This URL is presented within the document body, likely as a lure to trick the user into downloading or visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sony+mhc-ex9av+user+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/bpp_acca_p4_study_text.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/metibejulidifamot.pdf
    • https://cdn.shopify.com/s/files/1/0433/3204/2920/files/67813540571.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3831/files/tinusilani.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/37329677271.pdf
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/42860915361.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6d61d92a1c948e5b88b6573c3cee4dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_51e18f378204404bb747b8fc34048345.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ffa41a2f0a4ea58ef08650f38e5c37.pdf
    • https://static.usrfiles.com/ugd/b8c837_304c82db875343c7814cc21b1dfc30bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb8056e2478d4a9590e3d1a63ee3de1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1035d7638ebd4db7a7bd4b6e53a0d5f9.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008382.bin
7e321a6bdf1d45f92a82ac5d3c3be86381237bf349d10d8deb7453fb7ae1765b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8382 5560 bytes
font_01_sfnt_off00009640.bin
23921aeb95bde994b7682a194d4225c4179d83953abdebdd6daa4f63ab3c4b7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9640 14164 bytes