Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1015b7e4482862c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-29 11:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fe1df30728ebfcab86dac5ff6c91e2e SHA-1: e67fe8ad5cfefeae34777e61e2f0597d53f4c51b SHA-256: d1015b7e4482862c53ec35d72d16220b0d798512000d8022e73c509d8ee2120a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=pccn+study+guide+free'. This suggests the document is part of a phishing or malware distribution campaign, using a seemingly legitimate lure to trick users into clicking the malicious link. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a strong indicator 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/wix?keyword=pccn+study+guide+free
    • https://static.usrfiles.com/ugd/b8c837_9b046d81a2f444b681c42f903d205297.pdf
    • https://static.usrfiles.com/ugd/b8c837_311ac8a35f724e76879e5d5b94320154.pdf
    • https://static.usrfiles.com/ugd/b8c837_e71686ae0bf54d148562e98766d6f469.pdf
    • https://static.usrfiles.com/ugd/b8c837_7512fdf9bc5245d49cfd1570251fa20f.pdf
    • https://cdn.shopify.com/s/files/1/0438/2395/6125/files/kebuweji.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/diccionario_biblico_para_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/satorebubel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/76263583396.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0134/files/kevizatumudozonuxered.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/basic_knowledge_of_zoology.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/7121703414.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/xolewejabopezulabele.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/tufami.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/bluebeam_revu_2016.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_off00006993.bin
9c46cd49ed4d99723e9be4a373ff1421445a1d47c17be131088209f3f1d8a06e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 5048 bytes
font_01_sfnt_off00007ad5.bin
5d10e02ef0f732dd7515bda1992fcffed273e7c0a4f8083d2a2f1a3400c63a1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD5 10748 bytes

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