Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9936eeeef6d167…

MALICIOUS

PDF

42.4 KB Created: 2020-08-06 09:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 459a0fc20988c29c30eac681a3d7c814 SHA-1: b03e5f8c98675cd4814d4cbf54d719031c66eb35 SHA-256: 1b9936eeeef6d16753c3c5fda5384acf13be42ca1c420be7343615755f9e1f13
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=autosomal+dominant+polycystic+kidney+disease+pdf'. This indicates the document's primary purpose is to redirect the user to malicious infrastructure. The presence of numerous other external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted from this sample.

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=autosomal+dominant+polycystic+kidney+disease+pdf
    • http://files.edwinmclachlan.com/uploads/1/3/1/4/131406629/b2c85389ffc0fe.pdf
    • http://lunen.mrsbobbins.com/uploads/1/3/1/4/131454012/4e6552e0.pdf
    • http://jukubate.getorganizedbydeb.com/uploads/1/3/0/9/130969300/zexurobudezulumaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/57671213718.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/wekevubilovexafiletepo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/pugewumove.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/91442556727.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2275/files/66450363761.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/62962141229.pdf
    • https://cdn.shopify.com/s/files/1/0434/9906/1408/files/clicker_heroes_hacked_save_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/23608074430.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/fabokivuzudiseb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/jamufone.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/tirapuwowesubenewuto.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/tepabazevosiwulin.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_off00006828.bin
5129c5b5a119b138ea547b74f289ccbb0f74541f369312d3f10272933b2c5124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 5360 bytes
font_01_sfnt_off00007a61.bin
29feb8833daf7726a4418a40ccd982645170c3318bd59cfa43a91f5f8be059c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 9952 bytes

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