Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec4763b74462551…

MALICIOUS

PDF

47.6 KB Created: 2020-08-12 07:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 614ec49b88bbeb578feac2c277213dfe SHA-1: c27117444e30cd5555ca503650b11b0030feb0cf SHA-256: dec4763b74462551bcb1404b5c9ae9f26084173e106d64919349a622db8e52d4
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to a 'Rheem 50 litre hot water system manual' and the malicious URL. This suggests a social engineering lure to trick users into visiting a malicious site. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content.

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.cc/wb?keyword=rheem%2050%20litre%20hot%20water%20system%20manual
    • http://files.about666.com/uploads/1/3/2/7/132740435/mamazotogelanit-kewizum-pugilaguvukax.pdf
    • http://files.rainsparkle.com/uploads/1/3/1/4/131406390/a66260f2521.pdf
    • http://jajozi.frpstudio52.org/uploads/1/3/2/6/132696323/323053.pdf
    • http://files.flaglerbullsharks.com/uploads/1/3/2/6/132682386/9847540.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/69604523803.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/61378420520.pdf
    • https://cdn.shopify.com/s/files/1/0439/2953/4632/files/75504443584.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7395/files/65697034565.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0455/6816/4005/files/favitiduf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/27983243999.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/54143067079.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/53691610922.pdf
    • https://cdn.shopify.com/s/files/1/0431/8802/7543/files/how_to_install_seus_shaders.pdf
    • https://cdn.shopify.com/s/files/1/0434/1569/9621/files/xaxafotafogipededuwasu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/85203538068.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/84139621667.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/sepuzixekiweke.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_off00007b20.bin
5adeb8e05d54f66f6c43f21a8e23f67da45146eaee9fb5179f0eb686fe774cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 5392 bytes
font_01_sfnt_off00008d66.bin
8c7f388bc54919c45cad23ce5f2b9b493a607e47d33d9f9792a29dc243d556ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D66 10612 bytes

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