Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ff591e1f7e6a95…

MALICIOUS

PDF

41.1 KB Created: 2020-07-09 15:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787da4f958a543b2632d3dd9be907b84 SHA-1: e9a64dbd7ec4312edf2ac2fb4015d60d002dd18d SHA-256: 28ff591e1f7e6a953f7d1e051c62221f8bbdb8ef11e9ba2c10e207d5e1d6374c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.com'. The document body contains garbled text but includes the same redirector URL. The primary attack pattern appears to be the distribution of numerous links, likely to manipulate search engine results or to host malicious content, rather than a direct user-facing lure.

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/wb?keyword=grid%20paper%20pdf%20a4
    • http://files.bambooartscenter.com/uploads/1/3/1/8/131857071/pujeriwetid-napofemerumaw.pdf
    • http://files.key2evolve.com/uploads/1/3/0/8/130874318/zasabuxemer_xawapikiguromik_balasoge.pdf
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdf
    • http://files.trebor-ts.com/uploads/1/3/1/8/131871690/4fa93.pdf
    • http://files.michelletjohnson.com/uploads/1/3/1/4/131407424/6387409.pdf
    • http://files.coronaumc.com/uploads/1/3/1/4/131454436/nutotu.pdf
    • http://files.brushandbranch.co/uploads/1/3/0/7/130740344/2297158.pdf
    • https://riduvetixaxu.files.wordpress.com/2020/06/67439980271.pdf
    • https://sefofulevap.files.wordpress.com/2020/06/malinosolilex.pdf
    • https://komamik.files.wordpress.com/2020/06/83513340407.pdf
    • https://jununal.files.wordpress.com/2020/07/94347357025.pdf
    • https://porawinag.files.wordpress.com/2020/07/wafimagidafanisi.pdf
    • https://baxejubox.files.wordpress.com/2020/07/79405990499.pdf
    • https://somotug.files.wordpress.com/2020/06/44609119071.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46605756913.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92283418618.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bujebunefevefosilipepeju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.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_off0000661f.bin
3826b16a71e7386944af3f822c7f480bdb2912bdeb61206c0d9a9c50459ba688
pdf-font-stream PDF embedded font (sfnt) at offset 0x661F 4436 bytes
font_01_sfnt_off00007548.bin
861044fe31f1684fbd783c30aeaf1d0c82c09cc07081e6c200f7be34044410c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7548 10084 bytes