Malicious PDF — malware analysis report

Static analysis result for SHA-256 887c786e5200d9ce…

MALICIOUS

PDF

43.4 KB Created: 2020-09-02 20:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b513b7d88e294751ae0d6d6bca7d425f SHA-1: b652b3d93c9bba32c925876f1b7dbf6618f9b0d4 SHA-256: 887c786e5200d9ce289cb5c32b58d20f8869cb9afa932b3a5b98bb7801bb6a44
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.me/wix?keyword=speed+or+upload+speed+for+streaming', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files, suggesting a coordinated effort to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.me/wix?keyword=speed+or+upload+speed+for+streaming
    • https://static.usrfiles.com/ugd/bbd3cf_ddfeed91adb64b54813be49980b038e1.pdf
    • https://static.usrfiles.com/ugd/1e32c2_a2711587a5ed47ba9f300a83444a77a8.pdf
    • https://static.usrfiles.com/ugd/40512e_5b9c408ebdde400caf1921bfed3bfc0a.pdf
    • https://static.usrfiles.com/ugd/33ab24_e48fbc5d9c7a4a728d8cbf1fa3023e9e.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/basic_synonyms_and_antonyms_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/78588847303.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/22523767012.pdf
    • https://cdn.shopify.com/s/files/1/0435/0322/2944/files/acute_respiratory_distress_syndrome_management_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/improving_vocabulary_worksheets_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0462/4442/9984/files/kaxipezalogawele.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/63094258926.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/thyroidectomy_steps.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/ford_transit_2020_order_guide.pdf
    • https://cdn.shopify.com/s/files/1/0462/3633/6277/files/logoxufoxeguzab.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/96055011161.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_off00006b38.bin
1b292e5a45a322a0b9c791bd4ff63b3ec5961991e7b3fd70252b17dd968cdea2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B38 5464 bytes
font_01_sfnt_off00007daf.bin
7869e833184de42790f20d04ead36fa634c008ce3fe21a4e735076e024be02e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 10296 bytes

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