Malicious PDF — malware analysis report

Static analysis result for SHA-256 c130d5854b49793f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-19 00:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38ed552332f0f027bb2fd8fbc709b08e SHA-1: 6767a72398fbe17925c70b663a312e2cf2d9ca0e SHA-256: c130d5854b49793fb32a586dc091bc445b27e9b70a43bde11edf3b5f20c74792
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting an attempt to lure users to malicious content. The presence of numerous links to Shopify-hosted PDFs indicates a link farm strategy, likely to obscure the ultimate destination or to appear more legitimate.

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=keloid+forming+on+nose+piercing
    • http://files.miguellevy-paintings.com/uploads/1/3/1/4/131414134/zusore_bibibazig_kopevek_wokitegako.pdf
    • http://files.creapoponline.com/uploads/1/3/0/8/130814717/3199225.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/liver_cirrhosis_complications.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/zonaxisofujuwopunak.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/rilitirumujusugenivuga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1587610690.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3921/files/loxafomuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5501/files/catia_v5_surface_machining_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/abstract_test_practice.pdf
    • https://cdn.shopify.com/s/files/1/0452/4412/1248/files/85380754703.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/guxokomogufuxopeze.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/blank_check_template.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_off00006fb7.bin
0d6bbc7cf7d8bece6875e6007c8a3af250d80909ec166338d5b9a57c233b9954
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB7 5232 bytes
font_01_sfnt_off00008174.bin
af97f7f813d73e9ee7c3547779e951f27debd6f3f873ff6993816e662d8ea3e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8174 9288 bytes