Malicious PDF — malware analysis report

Static analysis result for SHA-256 f963fec4183dde0c…

MALICIOUS

PDF

43.9 KB Created: 2020-08-07 13:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71a57ff7a1ab77e49b36383bbf1aafa5 SHA-1: 3bbda62c05984db57ce9619e1d5ed21053f54f37 SHA-256: f963fec4183dde0c7dab6af818070b6eff9748e2f15a371a40de468192c0a075
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body and embedded URLs suggest a lure to download 'Adobe PDF reader', which is likely a pretext for delivering malware. The presence of a mass external PDF link farm further supports the malicious intent of redirecting users to potentially harmful sites.

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=adobe+pdf+reader+for+windows+7+32+bit+filehippo
    • http://files.calvarychapelsaintcloud.org/uploads/1/3/1/1/131164456/72bac0c423d10.pdf
    • http://files.tasteingainesville.com/uploads/1/3/1/4/131437308/kuleruwageja.pdf
    • http://timuvo.rooznote.com/uploads/1/3/1/1/131163667/7139601.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/xevurerajivokilirited.pdf
    • https://cdn.shopify.com/s/files/1/0435/8239/0440/files/37348934390.pdf
    • https://cdn.shopify.com/s/files/1/0449/9944/2590/files/media_moda_e_mediana_exercicios_resolvidos.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/tipedubamafudolerilewisiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/23324288144.pdf
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/ataraxia_filosofia.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/51380858985.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/12396119716.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/kezibitudowesexibodozi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/14093065062.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_off00006241.bin
3b257f15dd33263b0c069b1cd8fea15b54188b2240a3dabe0aa3ce1f428088d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6241 5724 bytes
font_01_sfnt_off000075cd.bin
4e0b5aa5a8252f25624eda97d4fbeaec2846bbe68bfc2610fabfb4aff7776c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 14332 bytes

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