Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b26e776b428ac9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-06 15:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d0e94b97e690836fd9f15e99459e083 SHA-1: 6fed2403f45cd39f3002457f2ae6f2086fbc3f76 SHA-256: a5b26e776b428ac9ed9dd96f3f1087ee0e938d5633396256724720fcafa581f8
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 external resources, indicating a link farm. One critical heuristic identified a malicious redirector link, suggesting the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'list of commonly used english words with meaning pdf' and the malicious URL, reinforcing the lure. The presence of numerous shopify.com links, while some are confirmed benign, suggests an attempt to blend in with legitimate content while masking the malicious redirector.

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=list+of+commonly+used+english+words+with+meaning+pdf
    • http://files.ledgestonecondominium.com/uploads/1/3/1/8/131856285/buzosimeti.pdf
    • http://files.adventuresuntethered.com/uploads/1/3/2/7/132740633/fda838e6a882.pdf
    • http://files.pantagespens.com/uploads/1/3/0/7/130776503/lamulela-foxosakala-xotufuwagika-lometago.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/denukudovujaburamiwawonus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4765/6351/files/xusupugimegapawali.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/79231577096.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/tikusuzidapuvobavesaxis.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/47179490403.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/27904485630.pdf
    • https://cdn.shopify.com/s/files/1/0429/3450/1535/files/69446713130.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0305/files/45290899380.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/potusibiritifepivo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/1476671407.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_off000064f3.bin
a31e99dfdd293733ecf08097648d6d6adb48c400b1c0dcddb41b003876d783e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 5704 bytes
font_01_sfnt_off00007852.bin
d598762c2fd58bead86bb7ce6fc81f8513728f0334354ebd0312fcdd1ae7d15a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 9028 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.