Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a03c4136ca0591…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 00:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f56fd801c21c1bfa0699f332837a88bf SHA-1: 83d41eb6ef0c108b2e99ad47d34f6b6b80f0173f SHA-256: 92a03c4136ca0591973cb5174ad49f0200101fe39c3440659d2a0abb8c186d56
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=bonjour+per+windows+7'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on platforms like Shopify and other domains. The document body, though heavily obfuscated, contains the same redirector URL. This suggests a delivery mechanism designed to lead users to malicious content.

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.cc/pify?keyword=bonjour+per+windows+7
    • http://files.dougblacktuba.com/uploads/1/3/2/7/132740536/ea694.pdf
    • http://bakuwi.apneaodyssey.com/uploads/1/3/0/7/130740450/6193149.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/dobepupedanusalanisulixax.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/darisokezujowekaxapupe.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7011/files/89246906407.pdf
    • https://cdn.shopify.com/s/files/1/0441/3738/2040/files/3002744594.pdf
    • https://cdn.shopify.com/s/files/1/0428/2200/8988/files/ap_grama_sachivalayam_notification_2020_freejobalert.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/bifurcation_of_andhra_pradesh_notes_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8611/0110/files/jadewugom.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/latuwavexixasexibirapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7505/files/oxford_bookworms_library_stage_3_a_christmas_carol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1033/4620/files/rigijejilafegemuboto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/86311659811.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/scales_chords_arpeggios_and_cadences.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/jakabufe.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_off0000522d.bin
9539cd1ca2a85bd9b62f573de0e9a2e4ea542e3e3ca4ad3897df47d4a58d78a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x522D 5588 bytes
font_01_sfnt_off000065c3.bin
6e51824bb8b7e4fefeed924ff574132381dc24f29f7905ac21107f3e75ab4245
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C3 5008 bytes
font_02_sfnt_off000076f7.bin
e32ae66c8cfd5bfdcfa23255590865b3d972d57bc48b0f4da9dcc2dc62ff5c73
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F7 9812 bytes