Malicious PDF — malware analysis report

Static analysis result for SHA-256 966bf265efed2611…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 22:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f046fd8770d6c31212de195d6b5595e SHA-1: 02bf9c1e1e1050db25cac456c2f11445ac73bc0f SHA-256: 966bf265efed2611da88ec03a024a80f32f13fa4ffd533f2452758fc5f822c7e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'case study research paper' and includes the primary malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for 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.com/pify?keyword=case+study+research+paper+pdf
    • http://files.hotcac.org/uploads/1/3/1/8/131857631/votuwi-jafebapo-belojaloxuduge.pdf
    • http://files.luftgear.com/uploads/1/3/0/7/130776277/fudomi-kagobob-noposofage.pdf
    • http://files.sheerramjohn.com/uploads/1/3/1/4/131437932/fad851581a2.pdf
    • http://files.artculturevs.org/uploads/1/3/0/7/130775727/3763f1d2.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4423/files/borulamutilabonunuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/25599611465.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0796/files/83463607090.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/wirefewe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/91328116468.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/45496304109.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/43026045174.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/lizigiditefuwigowiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/xomumutolef.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/bomubukidunuzazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2976/6039/files/dinixasojurosumedeniw.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_off000066ec.bin
a72200d5049b514233b5c32ad2478804c830ae5fb9451dcf269787c0e960bcf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 5220 bytes
font_01_sfnt_off000078ae.bin
d35e60d37ccc8135e590b146b05cecdbaeadf9e988786c348d8bcd56f8b09bc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AE 10024 bytes

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