Malicious PDF — malware analysis report

Static analysis result for SHA-256 a11f40bcc6e3eedf…

MALICIOUS

PDF

40.0 KB Created: 2020-08-04 16:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ff943ceb0ffba9fab516f1f26632aa SHA-1: 941e1257b10d4a8cde6d49087d8c940254df402d SHA-256: a11f40bcc6e3eedf723f9a6099a77c308f53fbcd66257d63cbacdbf63ae2cc29
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 suspicious domains or redirectors. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that at least one URL leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The document body, though heavily obfuscated, contains URLs that align with the heuristic findings.

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=plotting+coordinates+worksheets+pdf
    • http://gubuk.alardfilmfestival.com/uploads/1/3/2/8/132815002/bufozamamarow-pezotosufamu.pdf
    • http://files.beautiful-astrology.com/uploads/1/3/1/3/131397964/ea95b6f3ae15ca0.pdf
    • http://files.headofthekas.com/uploads/1/3/1/8/131856333/8113225.pdf
    • http://files.fitbyfire.com/uploads/1/3/0/8/130874295/vupozud.pdf
    • http://files.viptowingcorp.com/uploads/1/3/0/8/130874118/morekigagigobid_numajimipuwoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/dezufivepoluxelawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5372/7387/files/tumifalifimonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/vinetapiwefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47475247643.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/webofirupexoweparakur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/94267939228.pdf
    • https://cdn.shopify.com/s/files/1/0441/1251/1128/files/18738043684.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/figuxepukilin.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/29538289826.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/javascript_array_concat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/lejuniropufitabufuwidaxi.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_off00005e9c.bin
84b1ee0c05d5a3c49ec7b606135be7b3ae59a61fd3fe24c87e2b2bab286b4f9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9C 5576 bytes
font_01_sfnt_off000071a2.bin
df401f156513c4de4b5a20135d9725e207550df9c783246eb4224580587e0b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A2 9788 bytes

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