Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fb4a2ab0597096…

MALICIOUS

PDF

73.0 KB Created: 2020-08-17 17:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92da8f06a2f87451168e623038991b63 SHA-1: 14a64230f359add3c3179ca2a35c1dc6e78219ef SHA-256: 28fb4a2ab0597096831e74c50cad6376f519e713c929621cd45700a83e12a874
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.cc. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The primary attack vector appears to be luring users to a malicious site via a deceptive link within the PDF.

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=types+of+bolt+threads+pdf
    • http://files.senorahamilton.com/uploads/1/3/2/6/132681062/dutalaxiw.pdf
    • https://cdn.shopify.com/s/files/1/0448/0407/9777/files/basic_english_words_for_daily_use.pdf
    • https://cdn.shopify.com/s/files/1/0429/3980/9959/files/seagen_environmental_monitoring_programme_final_report.pdf
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/59614297589.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/gfta-_2_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/2020_oscar_winners_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/64570619299.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/37852730656.pdf
    • https://cdn.shopify.com/s/files/1/0428/5127/0823/files/what_is_reliability_and_validity_in_research.pdf
    • https://cdn.shopify.com/s/files/1/0437/3928/3608/files/controle_da_administrao_pblica_para_concursos.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/xajelegonikepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7254/4150/files/product_assortment_definition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf5.bin
f0425c95c19d6510d6640c5f02091fc2c7eb2f2fdcf70017502a2e44a0205114		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 5320 bytes
font_01_sfnt_off0000de04.bin
b9ae2458fe2f7ba4c2817c43cfb001ddc93b08a44b7d7bbc8bf81a9284798f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE04 10288 bytes
font_02_sfnt_off00010169.bin
1c1143839f05a5789524e75987812d4076a19e8c6e3280f717ab7b4921f49ba8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 16172 bytes

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