Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7ea25e6ec1589b…

MALICIOUS

PDF

47.0 KB Created: 2020-08-30 15:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de2bb8659c0edb487bbe41c037967b83 SHA-1: 00ef393a5ffab5381ff06f7bfe9956c3f50e5b66 SHA-256: 8d7ea25e6ec1589b965075fd79abb663d964fc57c198bf1fcd20a9b35eb25868
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=software+for+webcam'. This, combined with the 'SE_DOWNLOAD_BUTTON' heuristic and the presence of a call-to-action phrase in the document body, suggests a social engineering attempt to trick the user into clicking the malicious link. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to benign content, but the primary malicious link is clearly identified.

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.
  • 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
  • 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=software+for+webcam
    • https://static.usrfiles.com/ugd/b8c837_269a0ae271c24819a837d7c986639da6.pdf
    • https://static.usrfiles.com/ugd/b8c837_455508254f8b4f8782217f181e537766.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2f3e755c7684819adf616f6772488ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_14a25d68ba944863b75be45b38f4838e.pdf
    • https://static.usrfiles.com/ugd/856cea_ecafbd9dfac345fab37b069f59251a74.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/telugu_movies_2018_comedy_scenes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/53823127067.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/35609825752.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/bijanowusomesamufexipat.pdf
    • https://cdn.shopify.com/s/files/1/0464/8425/8984/files/barrons_ap_art_history_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1098/files/kenidolominojitejulofife.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/banda_ban_ja_garry_sandhu_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/nimegodoregunami.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0447/0718/4793/files/56174601781.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/dinivakazu.pdf
    • https://cdn.shopify.com/s/files/1/0452/4012/3552/files/kigofimis.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_off000071dd.bin
ec93b0ea25fe8cd48d0395c8db4f6459d402c6c7f0db9c1bbfc3dbba4f8bcaa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 5152 bytes
font_01_sfnt_off0000835c.bin
203223a92f1b9fe3026e4127c70a3518726e14f00e28fbebd87aa9654629e30c
pdf-font-stream PDF embedded font (sfnt) at offset 0x835C 13764 bytes