Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8861d35a3266a0…

MALICIOUS

PDF

62.9 KB Created: 2020-08-13 22:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74cecfb61a2bbebdde6a21e69e722c6a SHA-1: 400a80dee93734208bd48cf3d2647f7c8c9dc481 SHA-256: fa8861d35a3266a0d4fd9944b52fce3186b164843cb577c618b0816e263823a6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a 'PDF_SEO_LINK_FARM'. The primary malicious URL, 'https://ttraff.ru/pify?keyword=smithing+guide+rs+wiki', suggests a redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, indicating a likely attempt to distribute content or redirect users to malicious sites through a link farm strategy.

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=smithing+guide+rs+wiki
    • http://files.charveypublications.com/uploads/1/3/0/8/130873708/1e979f53.pdf
    • http://files.alicehjones.com/uploads/1/3/1/8/131856318/midilipewakeve-tivedolobiba-daxozifetetexu.pdf
    • http://vowegarav.genprice.shop/uploads/1/3/1/3/131379789/dunuzuf.pdf
    • http://files.bccupcakery.com/uploads/1/3/0/7/130738850/xonofikavunimuzisegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/9484530315.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9367/files/14175446438.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/fosigel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/juximosibenova.pdf
    • https://cdn.shopify.com/s/files/1/0434/8782/1984/files/wiguponozatewagolotoxux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/wakokuxububavavuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8964/files/curso_de_arcgis_10._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/attestation_d_hbergement_pour_visa_long_sejour.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/binumedesosamapupuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0824/files/43284112941.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/rivizipaledutitotub.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/cub_cadet_ltx_1045.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_off0000b31c.bin
794318acff9908b18df93b476473c4e748e99c657c2811d6a76f4e8496479235		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB31C 5256 bytes
font_01_sfnt_off0000c4e6.bin
4ee7908e0f1bd37ebfc45bc575477cc0bfbaabb86f2c0a2c5665af2bac5c5d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E6 13488 bytes

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