Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed9b1ccc28f5ab0…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 14:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fc0c4a11d3575bfd37766e81511b5f1 SHA-1: 0b05f64569a1b7c2efcb85edb38ba4e855692852 SHA-256: 7ed9b1ccc28f5ab008704e18546a8ed1c9d5d5bbf3bf4b1d974d09ac17b71b33
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated, but the presence of numerous links suggests a link farm or SEO spamming attack. The primary malicious URL identified is https://ttraff.com/pify?keyword=biacore+x100+pdf.

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=biacore+x100+pdf
    • http://files.waygoodtherapy.com/uploads/1/3/0/7/130740589/kewefimavum.pdf
    • http://tetat.dentistmedellin.clinicamenta.com/uploads/1/3/0/7/130776445/e3662a0.pdf
    • http://files.sherieunfiltered.com/uploads/1/3/2/8/132815961/a59b4b501cc8.pdf
    • http://files.elianed.com/uploads/1/3/0/8/130874110/1658290.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/kibapov.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/jatolebugifupo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/kozakebadefokifinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/97654809276.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/vapomofalalilanoxisol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/585462177.pdf
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/juxawe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/farivofebomukekunaduwo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/duwotewaxejatigazobuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/cyanogen_kindle_fire_hd.pdf
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/anticoagulantes_orales_nuevos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/xaxofavikuxirem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/staining_methods_in_microbiology.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_off00006464.bin
3d948ac8ee2380b0b201b1e4071b0a131d3ec836874110047e121b78311b8194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6464 5248 bytes
font_01_sfnt_off0000765a.bin
4951fd9e28f378c1a7c3817a03e7fed878f4ab5045e4d8c58567de564d5f3d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765A 18072 bytes

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