Malicious PDF — malware analysis report

Static analysis result for SHA-256 b570fc5e460b958b…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 18:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a4c4e010e7ea55bb63a99ca4a337c0c SHA-1: dc59fe56e4dde1d56b8181e8ad682f3183d007a7 SHA-256: b570fc5e460b958b876a937b16f5769de45315aca060d5abf9efa27462a31ad8
140 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to QR codes and embedded URLs, consistent with a QR code phishing lure. The heuristic firings indicate the PDF is a malicious redirector and contains a link farm designed to attract search engine traffic.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=qr+barcode+scanner+free
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/timupizeruparirimeseja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/fafolit.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/chandra_chakori_movie_songs.pdf
    • https://static.usrfiles.com/ugd/d17951_722b4a3acd284f5a85346149b50c117e.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/32777b_ba827f7b6b054a579970a48fbad39b9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7aad1a7d4d234b7d821a4e902bbc6bbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_da332fba4c2d416aa22f94bcbf61e122.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/mahabharata_amar_chitra_katha_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5284/3676/files/black_desert_gift_letter_of_repayment.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3493/files/aztec_gary_jennings_quotes.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/miley_cyrus_butterfly_fly_away_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0604/files/zitudemomojini.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/mathematics_all_formula_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/gopemokesanim.pdf
    • https://cdn.shopify.com/s/files/1/0437/6533/4165/files/45374834067.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/boiler_efficiency_calculation_formula.pdf
    • https://cdn.shopify.com/s/files/1/0434/5148/2278/files/rofako.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_off000064f9.bin
bfc29f7de0c2f71e9cdba4a23134907e49cfc9a90fc3d9d85191f27a7668363d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 3008 bytes
font_01_sfnt_off00006fa9.bin
9cde4309e7980610433e55cee3fce5a4a0eb60be6aead1bd553a0d59bfec0d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA9 5184 bytes
font_02_sfnt_off00008153.bin
2615a383d4659b979c9cf84ded9e9cb78d334ad94f705fc5930570b3ec0de4ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8153 10836 bytes

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