Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7bbd678c51d8128…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 13:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03397eab3f766fc8411b3ff3acce5086 SHA-1: 768cd27b19f756179ced88f3cd9cd467680a48c0 SHA-256: f7bbd678c51d81289398d1b9bb85e1a33c6a0bd56a062c1b2c2373298dcc1d36
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a high number of embedded links. One critical heuristic identified a malicious redirector link pointing to 'ttraff.cc', which is likely used to funnel users to malicious sites. The document body contains garbled text but also includes the malicious URL and several benign-looking URLs hosted on Shopify, suggesting a link farm tactic.

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/wix?keyword=free+printable+sheet+music+for+bass+guitar
    • https://cdn.shopify.com/s/files/1/0465/0719/6574/files/la_cantatrice_chauve_ionesco.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/23325389127.pdf
    • https://cdn.shopify.com/s/files/1/0463/0455/9261/files/tinejakaruzedajirulikuxa.pdf
    • https://cdn.shopify.com/s/files/1/0463/7858/2171/files/ares_wizard_zip_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/xegeranevivudenugodenij.pdf
    • https://cdn.shopify.com/s/files/1/0462/3859/7280/files/22086632714.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/71826072968.pdf
    • https://cdn.shopify.com/s/files/1/0434/8218/5893/files/concept_map_template_word_document.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/alligation_rule_in_maths.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/juviso.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/34613986636.pdf
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/46917256102.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/nevenuwoxowewamuludawi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/femme_fatale_episode_guide.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_off00005815.bin
cddde9e0d3ece4cea1f06048dde2eda38d5de97be6d3d08e4a5a7893702d1acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5815 5524 bytes
font_01_sfnt_off00006aab.bin
01dfb7cf39ea4a7c3fd3ac2327816b69e136c2077378f1685d5c24a6b2cf3c25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAB 10128 bytes

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