Malicious PDF — malware analysis report

Static analysis result for SHA-256 9050d1c47bdfd9f8…

MALICIOUS

PDF

121.8 KB Created: 2020-08-18 20:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22653ad628bfdca0833f62f67373accc SHA-1: 3816b93e6f294522a64b0d0e0c1a6fae4190360c SHA-256: 9050d1c47bdfd9f8c2c6e1c9703e8ac88e597947fbfe6f52642506db29ada06b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, with numerous links pointing to Shopify domains, one of which is identified as a potential entry point. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other PDF links, suggesting a lure to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=bleach+opening+5
    • http://files.magreenery.com/uploads/1/3/0/7/130776016/c4d1d5aa27996ad.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3965/files/fapisenumi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1472/files/dreamweaver_tutorial_for_beginners_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/nuwirezegodupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/python_import_module.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/chemistry_dictionary_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/zanusimugawon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/20662350982.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0314/files/merujidomawanoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/55979752029.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38140624907.pdf
    • https://cdn.shopify.com/s/files/1/0432/7810/6779/files/relakiken.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/marti_auto_works.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105ee.bin
898839189b7bcfdbe980bc30891ebf6b241df7589b645a2215454b25fd443077
pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 45532 bytes
font_01_sfnt_off000192b0.bin
6d2357939bff681ad63275fa0eb9a23957aadda14144797c07198dd4b3c190ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x192B0 5092 bytes
font_02_sfnt_off0001a3ff.bin
2f9ebfafa46d4c3f23af4ac849568f7164ad2455693bf485093c175a63a8841c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3FF 18104 bytes