Malicious PDF — malware analysis report

Static analysis result for SHA-256 35db090f4d210da8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 01:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 408799f746173405be55e73d085387cc SHA-1: 00bf31384e187078ba63629e5e271c8fefba9d65 SHA-256: 35db090f4d210da8509603b405564c10ef9b2ed33a927d1b0c4267877d98b1af
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, pointing to 'https://ttraff.ru/pify?keyword=antakshari+rounds+pdf'. Additionally, it exhibits a PDF SEO link farm pattern with 17 external PDF links, many hosted on Shopify. The document body is heavily obfuscated but contains the same redirector URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=antakshari+rounds+pdf
    • http://files.sacredibis.co/uploads/1/3/2/6/132680853/bitizit-xojawiz-bimifojisomeve-lamelofa.pdf
    • http://files.busterscinematicuniverse.com/uploads/1/3/1/4/131437330/5ad14.pdf
    • http://files.cockburnarchitecture.co.uk/uploads/1/3/1/4/131453302/48d552374b.pdf
    • http://files.betweenheavenandearth.org/uploads/1/3/1/8/131857650/xenere_sikarazas_fosafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5744/files/dafupesaridev.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/janatafimutobomijajo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/nevomupapunenarokupimem.pdf
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/lutevore.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/libibijoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/mokeremibamopipid.pdf
    • https://cdn.shopify.com/s/files/1/0432/8734/7364/files/banino.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/7955679785.pdf
    • https://cdn.shopify.com/s/files/1/0433/8846/9398/files/medical_case_study_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/vexuzitosokiwuxiwigatij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/taruxigired.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/kawajiverugobejor.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_off00006677.bin
4d7c508d8f735d80ea0e9b81dae77b6d1a8b58b9441417d38f13daa4b258039d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 5152 bytes
font_01_sfnt_off000077fb.bin
09768c3b2b1c096699b2b2d4862d06a76d286211571c100df06522e843cc55c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FB 10664 bytes

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