Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3695c99340f9f72…

MALICIOUS

PDF

43.1 KB Created: 2020-09-07 19:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3fb64a733e4348096c437fcd745de26 SHA-1: 6f2134bb791f4dfc0fcea82bee84b119e43863c2 SHA-256: f3695c99340f9f720401896c7a628761e49aba058a97d8ebff2e3b53738b4d95
128 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download for 'missing addend worksheets free printable'. This link, https://ttraff.club/wix?keyword=missing+addend+worksheets+free+printable, is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, embedding numerous other links, many of which point to Shopify domains, likely to improve search engine ranking for malicious content. The presence of a visual download button further supports the lure.

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.club/wix?keyword=missing+addend+worksheets+free+printable
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/99150968017.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jeravutudab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/vowofegefazirigosemuzilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/stenographer_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/lurokegenodegejexi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/66_astral_projection_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0466/7709/8661/files/couchbase_mobile_android_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuwuvedalolavotidexetugom.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6903/files/nedegipawimun.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/fiviwasil.pdf
    • https://static.usrfiles.com/ugd/485053_1dba2297a0f24b3f8c8fadeb895e19ab.pdf
    • https://static.usrfiles.com/ugd/b4609a_ab18322aa338480195455d21efd8ad2e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a09.bin
e0f796ba2bb00eb4b74661be5a6b90e131fbd876991aa9cf39e027704d37fc95
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A09 5392 bytes
font_01_sfnt_off00006c68.bin
e127a0613f7048bff911e474890d37b629d0530eef1390e3de1d075bbcdb1a35
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C68 10764 bytes
font_02_sfnt_off00008fdc.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDC 4324 bytes