Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f95d6d2505b9d22…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 13:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffea07331a0651eec2a70042e71984ee SHA-1: 57cb02fe09f0f8e58d29d5854887d3e78d176174 SHA-256: 3f95d6d2505b9d227ae97a99f2ddc49ffaeb531fb0ed47ea705300ef99886460
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=best+photo+beautifying+app+for+android', is designed to lure users with a fake advertisement. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to various PDF files, likely to manipulate search engine rankings or distribute further malicious content. No scripts were extracted, and the document body's content is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.cc/pify?keyword=best+photo+beautifying+app+for+android
    • http://zilodopi.makeitspecial.shop/uploads/1/3/2/3/132303374/baxuwu.pdf
    • http://fakufol.marktobin.com/uploads/1/3/0/8/130814355/mukuvexewemetez-kirozifiw-favaraz.pdf
    • http://files.queenslandcallers.com/uploads/1/3/1/4/131407164/1364286.pdf
    • http://files.drmadolynlinka.com/uploads/1/3/2/6/132680905/fce5335004130.pdf
    • https://cdn.shopify.com/s/files/1/0449/7945/4111/files/bhagya_chakram_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/vudavikokigokez.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/daxotus.pdf
    • https://cdn.shopify.com/s/files/1/0451/3474/1658/files/fogsi_guidelines_for_antenatal_care.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/wedding_invitation_template_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/furemovemazukur.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/91243413804.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sakumuxapiwitisozu.pdf
    • https://cdn.shopify.com/s/files/1/0454/2785/1422/files/83887003158.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/baverefivoxakiz.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_off00005f76.bin
789593bfcacb8a0a5b5318557b0efa0c4b0f2c91e58eb82dcb917803ba9a1107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 5564 bytes
font_01_sfnt_off00007258.bin
1e2cec6fe7dd08b4cb665ffa5b7f7057a201a202aedfe1480c7137fdf4accbf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7258 9956 bytes

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