Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc993ffc1dc9a4cd…

MALICIOUS

PDF

48.6 KB Created: 2020-08-18 20:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d7d43f0d7568b261a195f3fbd2c77d9 SHA-1: 21e8d14ea891391d4f3d2a35f1869b66b88efaec SHA-256: bc993ffc1dc9a4cd8f88c2793fb5f65bd940c78be659518a54d5cb0f3f9fe3fc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs to a malicious redirector at ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'aplikasi browser android terbaik dan tercepat' and the malicious URL, suggesting a lure to a potentially 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.com/pify?keyword=aplikasi+browser+android+terbaik+dan+tercepat
    • http://files.davidgarza.com/uploads/1/3/1/3/131382387/77bc396.pdf
    • http://vozix.willflyguitar.com/uploads/1/3/1/4/131438216/kopis-nozidatadabas-wemot.pdf
    • http://files.justanotherflutist.com/uploads/1/3/2/7/132712407/taturazewobak.pdf
    • http://files.myhulahoops.com/uploads/1/3/0/9/130969489/turipal.pdf
    • http://bazase.elliottmilesmckinley.com/uploads/1/3/1/6/131636665/4116278.pdf
    • https://cdn.shopify.com/s/files/1/0430/8244/9045/files/retirement_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/75951404985.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/cours_anglais_seconde.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/gems_education_logo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/92294457380.pdf
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/decode_base64_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/xawipemakedujud.pdf
    • https://cdn.shopify.com/s/files/1/0438/6465/3984/files/bewikaxubusifoku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/52444966085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.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_off00007f62.bin
af1aff458eddeb68f3a7b413d739dcad1d3d9fba0bedf0ce9a9c58d9e915773c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F62 5352 bytes
font_01_sfnt_off000091a6.bin
f3c7e52716e1755afe3aeb0f23906148061a216ee8eea06e2e88517240a23a1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91A6 10548 bytes

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