Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a651b71ee22d26…

MALICIOUS

PDF

40.2 KB Created: 2020-08-10 13:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c25c9e5417db8aaa72897a192cd3663 SHA-1: ba5752d1635a92741cd58dcbce629f620fdde165 SHA-256: 41a651b71ee22d2642c2bec0eb0b9c5201caff14ee8579fd4ac61bc26c3cf15c
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=new+aged+care+accreditation+standards+pdf`. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are hosted on `cdn.shopify.com` but some are on suspicious domains. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a potentially harmful site.

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=new+aged+care+accreditation+standards+pdf
    • http://files.weirdprovidence.org/uploads/1/3/0/7/130776673/e815cda1cab.pdf
    • http://mavipip.plasticactionuk.co.uk/uploads/1/3/1/8/131856372/muxoxivufadim.pdf
    • http://files.marvinjwolf.com/uploads/1/3/1/6/131607023/6f564be9.pdf
    • https://cdn.shopify.com/s/files/1/0452/1931/5872/files/download_al_quran_juz_1_30.pdf
    • https://cdn.shopify.com/s/files/1/0434/0200/2595/files/37103521693.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/35275317553.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/12133632773.pdf
    • https://cdn.shopify.com/s/files/1/0431/1882/1530/files/1972_biological_weapons_convention.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/96324024842.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/14854968160.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/3442778453.pdf
    • https://cdn.shopify.com/s/files/1/0428/3006/9927/files/fusionner_2_sous_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/vegezudupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5279/files/ciencia_ficcion_cuentos_cortos.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_off00005fdd.bin
11142bd951a8d14b5800dd7c446084693bf42bc270ae299bca28fbed572d22c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 5352 bytes
font_01_sfnt_off0000723b.bin
18cf9095435739a2e1cf5838e2d9393705006c9851ab5b4200679bd7a04ae3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 9900 bytes

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