Malicious PDF — malware analysis report

Static analysis result for SHA-256 b58b5b5b7a063600…

MALICIOUS

PDF

46.0 KB Created: 2020-08-22 21:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e378f4dd965bcd19ea744e320b53643 SHA-1: 55f40cb4f93b56635a45e89e123dac8be711548c SHA-256: b58b5b5b7a0636000bb7a8c48fcb3fbc4396b1664cbae74084e6918b5b25c4f8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to "banned apparel size guide" and embeds a large number of links to external PDFs, many of which are hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=banned+apparel+size+guide, is identified as a malicious redirector. The document body is heavily obfuscated and appears to be a mix of text and binary data, but the presence of the malicious redirector URL is the primary indicator of malicious intent. No scripts were extracted from this sample.

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=banned+apparel+size+guide
    • http://files.jennifershueyart.com/uploads/1/3/2/6/132681144/4467779.pdf
    • http://files.troutbum.ca/uploads/1/3/2/7/132710655/046c6686a.pdf
    • http://nibux.jasonmstephens.com/uploads/1/3/1/4/131437871/faxedebasiridir.pdf
    • http://files.demanddj.com/uploads/1/3/2/7/132740260/mulekobepojuba_buzuniwirosakos_sosutu_zodudawe.pdf
    • http://files.citywestetns.ie/uploads/1/3/1/4/131408183/b383c83ecb44978.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/lagu_amor_fati_epik_high.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/harmonize_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/affichage_classe_cp.pdf
    • https://cdn.shopify.com/s/files/1/0438/8772/2648/files/46498983985.pdf
    • https://cdn.shopify.com/s/files/1/0427/9212/4572/files/67063836680.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/black_and_white_periodic_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/capacity_of_parties_to_contract.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/2129261195.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/zusexedowatuno.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/tidanadoj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000536b.bin
605976c2cc1c17a47ccccab5ff7fe06637be8894dc6424c900974c032fe0010c
pdf-font-stream PDF embedded font (sfnt) at offset 0x536B 4916 bytes
font_01_sfnt_off00006421.bin
af65b0125366a62bbbaa3bf6bd79b2c57006a5f9c1a9720186daac530327fd5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6421 10404 bytes
font_02_sfnt_off00008804.bin
e7273338525a866f49bd556f13a0e46ce1e8513f85f175d9d987aa1f8b89adb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8804 16068 bytes
font_03_sfnt_off00009ca8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA8 4324 bytes