Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78b85087d0f635e…

MALICIOUS

PDF

35.4 KB Created: 2020-08-22 02:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a17335698ce4a4dbf29f463064c1ff2c SHA-1: 1f88dc2118acd58563e082fce815209fd33e375d SHA-256: d78b85087d0f635e271a84482604d2ecf42522ac16e22f9dae72df7d689341bd
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to a known malicious redirector, ttraff.ru, which likely serves as a gateway to further malicious content. The document body, though heavily corrupted, contains fragments of URLs and metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous external links, many pointing to Shopify, indicates an attempt 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=wrangler+outdoor+performance+utility+shorts
    • http://files.dylanrockon.org/uploads/1/3/1/8/131857117/jaroraj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/antonio_vivaldi_winter_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/4279930290.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/attack_on_titan_manga_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/nwod_mage_the_awakening.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/64053544232.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26450106566.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/lurajadiwuketikiwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/negapavur.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/97020600604.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pekuxiwitijumowiviw.pdf
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/93243107074.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/birth_certificate_amravati_municipal_corporation.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_off00004b8f.bin
5e9fec6f793f6ea79bb0cf1cdeb3af7e52ae935028e8410e6be14017cb2700e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8F 5684 bytes
font_01_sfnt_off00005ecf.bin
bfa2282c8510435f62294912a1b19713801a8fe017226032991cf552fdb02ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 10060 bytes

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