Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9b9d10cbe0f5d8…

MALICIOUS

PDF

43.8 KB Created: 2020-08-02 19:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a10ea48e5e66eda54ea4e07e2b759295 SHA-1: 07292972182453ee191218d2fd4bc0ba089fd8d8 SHA-256: bc9b9d10cbe0f5d888ead327cf0d1734a26d0dd164b4cb901156e734a9ec5514
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many pointing to Shopify domains, but one critical URL redirects to a known malicious domain (ttraff.cc). This suggests a link farm or SEO poisoning tactic designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the malicious URL and several other PDF links.

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=addicted+to+weed+reddit
    • http://files.dispatcherdame.com/uploads/1/3/1/6/131606861/vasipiv.pdf
    • http://files.bemedialiterate.com/uploads/1/3/0/9/130969310/jugudaxezubas.pdf
    • http://files.expandedcinematography.com/uploads/1/3/2/8/132814073/dibozinefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/97787397215.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/tukerodibip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5044/2652/files/74379883328.pdf
    • https://cdn.shopify.com/s/files/1/0437/8624/0162/files/javupozisexojifewagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/nalugeturup.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/ratavolo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/xipejeriti.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9477/files/zasikid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/jejuvamilotilerugupika.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/17878948120.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_off00006d15.bin
93071f0d570965337a8e918900abddd39fd67b18e6d6b80892e40ab983cbbffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 4596 bytes
font_01_sfnt_off00007cd2.bin
b395f3932fca2ed1e66611bf0a9d97c619675c16aaefeac64ff363021e3947ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 11092 bytes

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