Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ef8fe7830a73a1…

MALICIOUS

PDF

37.6 KB Created: 2020-08-08 18:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51928607a2671e54e23f620363ffb163 SHA-1: 47cece77e5e48da1365251e3bec72276999f7331 SHA-256: c2ef8fe7830a73a1174abeb01c26ff6de449fabf583b87877b9ed459ec519b47
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One of the primary links, https://ttraff.ru/pify?keyword=budapest+tram+map+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the tram map lure and the malicious URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous Shopify-hosted PDF links indicates a potential link farm or SEO poisoning tactic to distribute the malicious 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.ru/pify?keyword=budapest+tram+map+pdf
    • http://files.weejhatacademics.com/uploads/1/3/2/8/132814544/6324362.pdf
    • http://files.peggyshobbies.com/uploads/1/3/0/7/130775027/d5dc4815.pdf
    • http://files.leviclay.com/uploads/1/3/1/0/131070842/08c36a.pdf
    • http://files.submissiontosource.com/uploads/1/3/2/6/132695994/5a5275ee1b.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/68943676369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1188956193.pdf
    • https://cdn.shopify.com/s/files/1/0437/2480/0154/files/comment_out_markdown.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9095/files/kevapatuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/54924269358.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/23853072199.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/gemapotobonizukok.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/41123599570.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/zisivus.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/zabagixufukatisiku.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/situdemejukul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3281/3469/files/tojifewa.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_off000054bc.bin
5213579e8bc2b363af7887674c7631dd0e543832677da94b785dc26762efa13d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54BC 5204 bytes
font_01_sfnt_off0000665e.bin
3349cd2a4a6e2e958d81d3cf7d354ff05bb9259ee751c612461e8a3abc51e573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 10488 bytes

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