Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4caef0c3c7a1537…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 12:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40d700e4b68fc4228db784d1ad90b69a SHA-1: 155f5177accabb966b48f6ee74ddaf43e58b5ddc SHA-256: b4caef0c3c7a153738e52f960c830fb8aa0e44152f15099723fcd3068e18efca
120 Risk Score

Malware Insights

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

The PDF document contains a link farm, with multiple embedded links pointing to external resources. One of these links, 'https://ttraff.com/pify?keyword=converting+measurements+worksheets+grade+4', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous PDF links, many hosted on Shopify, indicates an attempt to disguise malicious activity within seemingly legitimate content.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=converting+measurements+worksheets+grade+4
    • http://files.draysonquarterbackacademy.com/uploads/1/3/1/4/131482915/felilon.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/discord_not_picking_up_voice.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/isotopes_examples.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/pumped_up_kicks_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4189/files/gabuxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/western_union_receive_money_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/6161/4494/files/zokew.pdf
    • https://cdn.shopify.com/s/files/1/0430/2949/5959/files/golala.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/cuestionario_sf_12_calidad_de_vida.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_off00005f83.bin
0320afe3032f9b8445093107599ef23f3aa0fafe2f44d2400673e069cbb97706		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5416 bytes
font_01_sfnt_off000071da.bin
d321e992f63acb7bb178742124b7101e447f4843f23b22260cee9773eee32203		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DA 9952 bytes

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