Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1987926bd23cfcc…

MALICIOUS

PDF

47.8 KB Created: 2020-09-03 03:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53834dc63e439115007e530327fb4451 SHA-1: 21372574643e39d6e55501e4fdc1c958e29306df SHA-256: a1987926bd23cfcc84d3e3ce6a2fa22b12db931e7cd18f8f4e00b29314da37eb
120 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=equivalent+fractions+grade+6+worksheet', is designed to appear as a benign educational resource but redirects to malicious infrastructure. This indicates a social engineering tactic to trick users into visiting a harmful site.

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=equivalent+fractions+grade+6+worksheet
    • https://static.usrfiles.com/ugd/33ab24_8beaa37090794f749a52704a8c1fd909.pdf
    • https://static.usrfiles.com/ugd/225520_f7213ab77bc546ea8a61dc8b89f27312.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_c7b493a5f10c40f995f44d109f5dbb58.pdf
    • https://static.usrfiles.com/ugd/d5415a_2b1ab16a3a9b4a36806f5a5382c5fd4a.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/logical_and_critical_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0450/7897/0533/files/tecnologias_de_la_informacion_y_comunicacion_libro_dgeti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5104/files/sazuvegudilofaniditide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64831632673.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/jilugezijotisapod.pdf
    • https://cdn.shopify.com/s/files/1/0461/7194/7161/files/35105878961.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/retinoblastoma_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/44095661602.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/lulubuwivenedik.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_off00007b29.bin
2fef030a5ec1394cbe4b50bdd356ebf50f125fcf14eb854ebc8481d9e1f86e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B29 5736 bytes
font_01_sfnt_off00008ec8.bin
62042a9bf6407edb1ca297f9937d7a5fdce71bd4a91b01f3e6d946c2fae9a4d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC8 10372 bytes

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