Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6e790ab3bd83a6…

MALICIOUS

PDF

48.5 KB Created: 2020-07-26 11:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726cf3e815355efca1e08429e1e735af SHA-1: 701041c89e2e67eda85521b71f6fe3301ddf98ef SHA-256: ec6e790ab3bd83a6838ba5a2868b6bb1732a542d709f19831893ed4c093989ca
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical heuristic indicates a link to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'lab equipment names and functions answers'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to 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.ru/pify?keyword=lab+equipment+names+and+functions+answers
    • http://files.carlosplusplus.com/uploads/1/3/1/6/131636954/fodesinonar_pukezoze_texuvojubog_giwujobuk.pdf
    • http://files.realmegaworldproperties.com/uploads/1/3/0/7/130776368/xetegenad-vikizinagabomib-livaragirowezej-forevibupuzuzow.pdf
    • http://files.sprangerbusinesssolutions.com/uploads/1/3/1/6/131607063/cf7d78ebea4.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/21119735183.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/55922368357.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/kaburukon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/78781063491.pdf
    • https://cdn.shopify.com/s/files/1/0438/2189/1746/files/juxuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/79174220744.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/jijurimusazizemoxisuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/35548188044.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/bukegisibemoguzifiz.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/
    • https://cdn.shopify.com/s/files/1/0431/8353

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f16.bin
5737a864c86bf93823e578fe9943eb29a41dfb68ba507ca19687c4821eaf19fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 5452 bytes
font_01_sfnt_off00009189.bin
f532ea38fb68eaa42a0b8de651c77c3664fd238ef5973884351e3d1a0f4c9a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9189 10340 bytes

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