Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc3c86b4077217f…

MALICIOUS

PDF

42.7 KB Created: 2020-08-16 20:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ca847374508abe07c4e2e96e9475117 SHA-1: 39aca7fa7b4c1006d4aecea83ee7ba2cd25db933 SHA-256: bdc3c86b4077217f1580c6f8f7ac4f83735883307e4bac2b5fd4d45a0ea5000d
150 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is designed to lure users through a link farm to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was largely unreadable binary data.

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=chicken+casserole+healthy+food+guide
    • http://mapod.meadowhillfarmcv.com/uploads/1/3/2/7/132740285/natikaw.pdf
    • http://xemopukov.ice-fyre.ca/uploads/1/3/1/6/131637136/8503647.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/16508126939.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/99298709982.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/derutat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9394/files/fuwexirujetavaxanawi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/anatomy_of_abdominal_muscles.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/58936864991.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/39017737778.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_off000068d8.bin
b61b0cbee0b30b5ca468413cb329f4e0d24db2594288ee8332232de0e35a4f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 5356 bytes
font_01_sfnt_off00007aff.bin
26d20a5ce0535c10bf2cade03fde19e00b3d5bb116f0faceb513da441dd50027		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFF 10444 bytes

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