Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcacda0d248e085c…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 04:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0ac0a0ed8d311f6539c385ba1729e3c SHA-1: a0fc3822123c37501e80fba33ad1312fcc6f54b4 SHA-256: bcacda0d248e085c3552b7457efdf5c4cd04f707876be00dad778bdc456b8c93
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with at least one pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.cc/pify?keyword=hachiko+statue+japan+guide. This suggests the document's purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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.cc/pify?keyword=hachiko+statue+japan+guide
    • http://files.allskillsenglish.com/uploads/1/3/1/3/131381422/217862.pdf
    • http://domiravus.avhauling.com/uploads/1/3/1/8/131856772/lugiwegotox.pdf
    • http://wavizodu.hannahhsieh.com/uploads/1/3/1/8/131871729/falefisumumiwesow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/nisilagadujutirolusaguwid.pdf
    • https://cdn.shopify.com/s/files/1/0434/5354/6656/files/mexuzipuxebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/capital_expenditure.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/kipud.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/nuzudepe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0318/files/220_bus_timetable_carrigaline.pdf
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/43907931487.pdf
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/paluzig.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/cours_complet_amplificateur_oprationnel.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_off0000640b.bin
205d571a8ee796319f0453aac47d33e1bb828fcadf750dc8f0c1e621ca614ccc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 5308 bytes
font_01_sfnt_off00007610.bin
13d7039493defe17016488363b3fe916c8e5e1e44233a6e4d52c4e35fa0ccbd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7610 10436 bytes

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