Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4687ceab050bca…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 13:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743481515b85c72e009c3e76dbea980c SHA-1: f595e8b93a9889c0f988ae47f64bfb3402773ee0 SHA-256: 1c4687ceab050bcabd24cfe6bea4fd8d1207b8fbe37817136019cba10eb76f6f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to external PDF files hosted on Shopify. One URL, 'https://ttraff.com/pify?keyword=kellerbier+style+guidelines', is identified as a malicious redirector. The presence of numerous links to external PDFs suggests an attempt to create an SEO link farm, potentially to boost search engine rankings or distribute malicious content indirectly. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the specific lure.

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=kellerbier+style+guidelines
    • http://puwafivef.ipmed.org/uploads/1/3/0/9/130969204/rerebovox-lunuvi-sifudekenen.pdf
    • http://files.iainmcnallyvirtualtours.com/uploads/1/3/1/4/131411688/buvokimegom.pdf
    • http://files.oakclass.com/uploads/1/3/0/7/130740069/xunevarapaziv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/tivivirorodezijef.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/8049443985.pdf
    • https://cdn.shopify.com/s/files/1/0432/6182/1092/files/ruriwakaxajeguwozamujube.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/97045229225.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/22717139703.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2007/files/clinician_s_thesaurus_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/24900070379.pdf
    • https://cdn.shopify.com/s/files/1/0452/2462/4288/files/protect_adobe_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/vavizabogexitofepopele.pdf
    • https://cdn.shopify.com/s/files/1/0439/1501/8392/files/23134012430.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5387/files/potasowuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/4695/2351/files/99576483912.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1293/files/bebukerelonawobadinupidon.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_off00006520.bin
70a0e982a655b7730251897c7145e7554c4fdd19a0518dc7b8a853d56396d140
pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 4992 bytes
font_01_sfnt_off0000762f.bin
b67cf7c1ae64192a255d613b6d6931cb6c1d2da9ccc8a4ff100138b9f2a8475b
pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 10432 bytes