Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e17fce22117914…

MALICIOUS

PDF

42.5 KB Created: 2020-09-17 11:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04e466b5a567e4d58f46ed97f01b0c80 SHA-1: 4ebbc2a76cefcaddee2015e1efc4844958fc7b79 SHA-256: 26e17fce2211791474daf53bfd6a0c9c1faffce231ac8051ae7ef09ed9de98fb
150 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download for 'Xender apk download 2019'. This link, https://ttraff.link/wix?keyword=xender+apk+download+2019, is flagged as a malicious redirector. The document also contains a large number of embedded links, many pointing to Shopify, which is characteristic of SEO poisoning or link farm tactics to improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.link/wix?keyword=xender+apk+download+2019
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/wii_u_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/bootstrap_template_example_with_code.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7109/files/guess_something_game_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4882/8065/files/ielts_reading_answers_of_therapeutic.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7464/files/google_docs_find_and_replace.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/zekuxivupezesabusezip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/nikizopukiramikutodipolut.pdf
    • https://cdn.shopify.com/s/files/1/0465/8354/6023/files/90005555758.pdf
    • https://cdn.shopify.com/s/files/1/0433/7097/1299/files/65556765159.pdf
    • https://cdn.shopify.com/s/files/1/0428/6437/8022/files/ksb_pump_technical_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/4980340072.pdf
    • https://cdn.shopify.com/s/files/1/0430/9178/7937/files/hangout_extension_for_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.pdf
    • https://54e5374d-9473-4ae1-9bcd-1f1e72f7426d.filesusr.com/ugd/48f461_0fd0887cfe31426f80373bea750eb956.pdf?index=true
    • https://60c3d778-44db-4d1b-a2d0-fbea5bd1f91e.filesusr.com/ugd/dbbfd0_a42213d230f045b3932c8cd3cc2d197c.pdf?index=true
    • https://57355cc5-bea6-4b20-b18c-8aaa7825df96.filesusr.com/ugd/4ae4db_cd3767feec1b4af28aaf1537da7edc00.pdf?index=true
    • 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_off00006684.bin
fb8e31cc5378bcf99d16a321921ded469f7e12e44bf1bace6de436c731c39a0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 5388 bytes
font_01_sfnt_off00007903.bin
2ba51953c95091f66a138d762812ef796e6f2989e6e2cee2f02b6d0ae640fad7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7903 10604 bytes