Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb84588eaae2596e…

MALICIOUS

PDF

43.0 KB Created: 2020-09-07 22:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 150dde9cc0cb01067ae418c1879e4db5 SHA-1: 2205ed961928fbbf7a57d3bcacbf56b8eca5cbe6 SHA-256: fb84588eaae2596e48dc351f1c263f7111f6be0a6f9897c331904c5a16b7f320
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting a lure to a phishing or malware distribution site.

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.link/pify?keyword=baking+sheet+hot+dogs
    • https://cdn.shopify.com/s/files/1/0432/5412/0606/files/branding_guidelines_template_indesign.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/lingua_latina_exercitia_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38030937597.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/motuzi.pdf
    • https://cdn.shopify.com/s/files/1/0461/9721/1294/files/aluminized_sheet_metal_suppliers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/paediatric_hypoglycemia_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/7754/9726/files/91059753617.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/89278948437.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/kukebogozufifolaluteb.pdf
    • https://static.usrfiles.com/ugd/41f880_1f38e84a9f104801931a0940265c8549.pdf
    • https://static.usrfiles.com/ugd/1d64af_14ab78714772471cba685ec748726629.pdf
    • https://static.usrfiles.com/ugd/740d8c_e49ec3ce1a874654bf45f080ee032a70.pdf
    • https://static.usrfiles.com/ugd/bf650e_960c17b62c04458f93a42d5273991e7c.pdf
    • https://static.usrfiles.com/ugd/3225da_d1ddd8e3e9a54679acc9ee9a6b0c204c.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_off00006934.bin
cf4237bc4760b18a654a22c9c7fc0898938001255ccabd7b25fcfba3e2201cd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 5072 bytes
font_01_sfnt_off00007a77.bin
a20919f038d22876f44cba7f9c92b898b46e828dfe2a6e58461ec5b7442d67e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A77 10812 bytes