Malicious PDF — malware analysis report

Static analysis result for SHA-256 a121f0fa98350cf6…

MALICIOUS

PDF

35.7 KB Created: 2020-08-17 07:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3337d7020765febfdce036bafd3602b SHA-1: a73a424256c329f91d9429f6fe4a2af0ca87e12c SHA-256: a121f0fa98350cf6c437a4f11adb4ee6d60c6d5d794333350dd90dc067f113e0
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 link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=ambience+wav+sound+free, which likely serves as a gateway to further malicious content. The document body contains a large number of embedded URLs, many pointing to Shopify domains, suggesting a tactic to obscure the true malicious destination.

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.ru/pify?keyword=ambience+wav+sound+free
    • http://files.janenodinejewelry.com/uploads/1/3/1/4/131453221/4865848.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/42326209585.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3452/files/mivalul.pdf
    • https://cdn.shopify.com/s/files/1/0438/3644/0733/files/bipegus.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/zakujupawugiwejumofo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/pusidipokizaretujuguj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9157/files/mcdonalds_uk_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/21928396577.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8700/files/synaptic_plasticity_taming_the_beast.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8632/files/wijejumaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/61077980336.pdf
    • https://cdn.shopify.com/s/files/1/0433/6395/8938/files/50294585333.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/55309046915.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_off00004d2d.bin
b57943a522c65eacff4dbda38edbac5e53498266380d84b0fe7efb8384dc16b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2D 5416 bytes
font_01_sfnt_off00005f8a.bin
4f103ff95c6dca4c633d0213e330ef83328eecdc53c6c8d23d11c96c4161c646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8A 10124 bytes

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