Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b09edfdef86555…

MALICIOUS

PDF

40.6 KB Created: 2020-07-09 18:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9431e00150815bfa7e90acd70f3d36e9 SHA-1: f98839132b3e9ea06c733dcc80671b3aa8ccc495 SHA-256: f4b09edfdef86555a8e110e04079c23ce2b3420587a4cc8f921d9f0baf11304d
120 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, disguised as search results for popular books. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.com/wb?keyword=oxford%20bookworms%20library%20stage%204%20the%20scarlet%20letter%20pdf`. Another heuristic flagged the document as a link farm, with many embedded URLs pointing to PDF files hosted on various domains, suggesting a coordinated effort for SEO manipulation or malware distribution. 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/wb?keyword=oxford%20bookworms%20library%20stage%204%20the%20scarlet%20letter%20pdf
    • http://files.wkgma.com/uploads/1/3/0/8/130874554/7b5425aa.pdf
    • http://files.mothermoon10.com/uploads/1/3/2/6/132681758/zuvigodesuvamulab.pdf
    • http://files.teachloveinspirecreate.com/uploads/1/3/0/7/130740127/4db936.pdf
    • http://files.byrdcreekcoffee.com/uploads/1/3/0/7/130739132/vuwaxeluvedam-badedepuvopir-zovepo.pdf
    • http://files.bubba-and-friends.org/uploads/1/3/1/3/131383305/1707274.pdf
    • http://files.vmacbusinessdevelopment.com/uploads/1/3/1/3/131384660/27db02f915549fa.pdf
    • http://files.stephencoetzee.co.uk/uploads/1/3/1/4/131454436/476610.pdf
    • http://files.milightning.org/uploads/1/3/2/3/132303248/wiratepanev.pdf
    • http://files.hhrstrategies.com/uploads/1/3/1/8/131871829/jetamonike-gekavukas-kuxesivi.pdf
    • http://files.thealbertafloodroseproject.com/uploads/1/3/0/9/130969555/13cd00738d.pdf
    • https://panamekeze.files.wordpress.com/2020/07/xevadojotatidirikobofoni.pdf
    • https://pajefobipisa.files.wordpress.com/2020/06/tuzusajifabo.pdf
    • https://pevuwuke.files.wordpress.com/2020/06/fonojuwisemine.pdf
    • https://virebon.files.wordpress.com/2020/06/vagafilukefunizulefasa.pdf
    • https://worelelagep.files.wordpress.com/2020/07/44908440896.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sekokejeninidifowabofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tawoxusabevesumaxev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.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_off00005e80.bin
10c78e1ee22a49df327aaafe19ce59419f74ee5d5d67fe4d30c907a7b8b794bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E80 5832 bytes
font_01_sfnt_off00007281.bin
25c624d058ec370dbc01057bdaac869ee602cc7ca41a623d641bae3b7b56caa1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7281 10064 bytes