Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35bcb60f5263e91…

MALICIOUS

PDF

41.8 KB Created: 2020-08-06 17:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ff1214f127015afe8aa5c5b150cae2 SHA-1: 7f8a2ad9c6b93ebd64399511b7ccd3d4c7af1ae5 SHA-256: d35bcb60f5263e911890f3d05caee64fa348c201059ad0f373a5a3b870faf1f4
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic identifying it as a PDF link farm. The primary malicious link points to a redirector URL, suggesting an attempt to obscure the final destination or engage in traffic manipulation. While no scripts were extracted, the sheer volume of links and the presence of a redirector indicate a malicious intent, likely for SEO poisoning or to lure users to malicious 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.ru/pify?keyword=amsler+grid+test+pdf
    • http://misusirim.marcorporation.net/uploads/1/3/1/8/131872225/e76acdd8671.pdf
    • http://files.manateehavendecorativeartists.org/uploads/1/3/0/7/130775866/wilevelesitomusa.pdf
    • http://files.konjipikaron.com/uploads/1/3/1/3/131383456/meveverozu-julavetasaba-lotisomojej-mebovivef.pdf
    • http://files.macrudanextracts.com/uploads/1/3/1/4/131437064/234248.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/skyrim_se_script_cleaner.pdf
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/97123159766.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/rawatoguvimos.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/4184889743.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/toshiba_projector_television.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4283/files/92664581346.pdf
    • https://cdn.shopify.com/s/files/1/0443/4237/8652/files/bone_grafts_in_dentistry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/naduz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/kajifokodifiwurur.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/33656209815.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/17162879543.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9632/files/sizugisapeminabaniwo.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_off000066aa.bin
e2063f176a8d7a900f2192e57336a67c97509b9267b18530de3b049d06b2792c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AA 5140 bytes
font_01_sfnt_off00007815.bin
8c107804c0db6dd61b58d6f5a6bc3ce227a331ed1e9ea5836622e35901b18902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 10172 bytes

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