Malicious PDF — malware analysis report

Static analysis result for SHA-256 57cdf58e8efd1eec…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 15:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a020fb24d7fd1f8ec38c1a81de942725 SHA-1: c203ab8b87d9b9f8f982e304cfaf92dfcd7ee053 SHA-256: 57cdf58e8efd1eec702ccf209aeec87e8efd2e6fcf9e17d97e81cdee578a6753
150 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=free++seagull+bartender, which is likely used to obscure the ultimate destination of the attack. The document's structure and embedded links suggest a phishing or social engineering attempt, aiming to lure users to malicious content.

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=free++seagull+bartender
    • http://files.daybreakersolutions.com/uploads/1/3/1/0/131069819/bawax.pdf
    • http://files.thestpeters.org/uploads/1/3/0/8/130814205/voxezopim.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/dialectics_of_liberation.pdf
    • https://cdn.shopify.com/s/files/1/0434/6891/4838/files/kenmore_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/43066242314.pdf
    • https://cdn.shopify.com/s/files/1/0437/0055/1830/files/riello_burner_parts.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/13441950985.pdf
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/32102677584.pdf
    • https://cdn.shopify.com/s/files/1/0438/2644/6498/files/92346100705.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/free_hindi_serial.pdf
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/advantages_of_cluster_sampling.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/58801112098.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/26029432605.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/jeridibepezisepovijevile.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/madotozuli.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_off0000720a.bin
221a4dbe54f1fa2066ad4a6b730bb383e06bea45db4c82e6bc85e0e9a9eab8d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x720A 5088 bytes
font_01_sfnt_off0000835f.bin
de5f64bc9b64bbb4662c3e4b86cf62d942034a42d873b66fd54c171bd3e3eb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835F 13056 bytes

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