Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc718f73efef1377…

MALICIOUS

PDF

34.3 KB Created: 2020-08-28 17:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1c69d602d187cc0f3a786b972fc44b2 SHA-1: f83db52695a8ef7f1ec1d9345c75c91c9a5eefd4 SHA-256: fc718f73efef137727c31c7fffe9a74ec8ce29564cec3aa21bacaa9cc63f2abb
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to obscure malicious destinations. One of these links, 'https://ttraff.cc/pify?keyword=a+beautiful+wedding+jamie+mcguire+pd', points to a known malicious redirector. The document body contains garbled text but includes the same URL, suggesting it is the intended lure.

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=a+beautiful+wedding+jamie+mcguire+pd
    • http://files.she-wolfwellness.com/uploads/1/3/1/8/131856072/xotim_muterexetagip_wufizefobisa_pesuva.pdf
    • http://files.thelongwellfiles.com/uploads/1/3/1/3/131382531/323278.pdf
    • http://files.talachedairygoats.com/uploads/1/3/1/0/131070712/tudezakuf-dejura-finuvubu-vuzogub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5506/files/boston_bruins_able_schedule_2019-_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/datudipij.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/vonubetusimavorupinax.pdf
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/total_knee_replacement_rehab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/pixelozakadikomukoval.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/81804948260.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1948/files/internet_explorer_11_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/dr_all_terrain_mower.pdf
    • https://cdn.shopify.com/s/files/1/0434/1822/2753/files/86768933801.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/pupunome.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_off00004625.bin
87acba7c111f62ed624126a200d9935b484212859de0a9ed802de90af6ebe20f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4625 5596 bytes
font_01_sfnt_off0000591c.bin
d09a6190420d9507f18a3c59b663d22d15ebec4f68bc4c0b4cf26e3efcf1e89a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591C 10352 bytes

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