Malicious PDF — malware analysis report

Static analysis result for SHA-256 93780c98bbbb5851…

MALICIOUS

PDF

49.7 KB Created: 2020-08-23 01:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0cdd8b8126dc34318364fc464d3b1a0 SHA-1: 849b810f64a9f4afc8b3127e03fd3a7b3557d1a8 SHA-256: 93780c98bbbb5851c2b26459a1bc8e4d564c95895cc71757185c7dd5cc16c671
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=utorrent+32+bit+free++softonic'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for the malicious content. No scripts were extracted from this sample.

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.com/pify?keyword=utorrent+32+bit+free++softonic
    • http://files.pigmansproduce.com/uploads/1/3/2/6/132681916/fufefopinejazikapaju.pdf
    • http://tujugum.welshbaskets.co.uk/uploads/1/3/0/8/130813077/xagiwojodode-darojazijez-zezukomubadafu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/90504097786.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/todag.pdf
    • https://cdn.shopify.com/s/files/1/0440/1925/3413/files/63794675841.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/1697632306.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/wifejerozuvixizelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/contenido_procedimental_actitudinal_y_conceptual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/moxivokalexuzo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/1-_99_runecrafting_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/sami_gta_sa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/lazuxijutazudoxefapoxus.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/non_probability_sampling_types.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008ab9.bin
1d45d35b8ebad7d41c36a10ca8a377a83eb07d4df34d546d94187459dfa88e8c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8AB9 26724 bytes
font_00_sfnt_off0000587b.bin
9e688405dbe8137eb3ce09082b93417f1a5e7711e9e14fba62ff2e7b2dae99f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x587B 5060 bytes
font_01_sfnt_off000069c2.bin
91e17092b97390db6a9bc2060a884ace2aad49a422c74637be9473ef901e0872
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C2 9528 bytes