Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0d454f1d4f4552…

MALICIOUS

PDF

132.9 KB Created: 2020-08-10 05:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09cb783bdd5f8f8ebdd8a6b228d77f34 SHA-1: 93037cfa1f9efe38e39b89ededecf33ec822c4f1 SHA-256: af0d454f1d4f45525f7381a4199e5f7460f8918b7fd5f71bdcef256955792ed6
128 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, specifically pointing to 'https://ttraff.ru/pify?keyword=aspen+nutrition+guidelines+2020+pdf'. Another critical heuristic indicates a PDF link farm, with many external links, suggesting SEO manipulation for traffic redirection. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure. The SE_URGENCY_LURE heuristic further supports the social engineering aspect of this attack.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=aspen+nutrition+guidelines+2020+pdf
    • http://files.csubaha.com/uploads/1/3/0/7/130738903/5648202.pdf
    • http://sotejozaj.reedinstructionaldesign.com/uploads/1/3/2/8/132814930/ce019.pdf
    • http://files.spaceclubgolf.com/uploads/1/3/1/3/131382032/bifefobofojovul.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/curso_de_ingls_avanzado.pdf
    • https://cdn.shopify.com/s/files/1/0433/9364/6753/files/javalenonutuxunabukaleku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/waloxotazebujofamobimebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/34672301811.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/lactic_acid_bacteria_classification.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/free_western_movies_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/4230099758.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/penofujosukadotazul.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/lexelidunakotujoxelamano.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5094/files/sakonogutegigomomas.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9363/files/97914138073.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/cateterismo_vesical_procedimiento.pdf
    • https://cdn.shopify.com/s/files/1/0436/9963/4326/files/82972598455.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a09b.bin
f0b455c392510131015ff0db2ca2fc29a3c491e7586b9b2670341426915d4fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A09B 5144 bytes
font_01_sfnt_off0001b22d.bin
4b17db383715ab7790fcee1125a5c769ce73a8b76004c5b284a32875714b4e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B22D 15388 bytes
font_02_sfnt_off0001e29b.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E29B 16060 bytes
font_03_sfnt_off0001f733.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F733 4324 bytes

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