Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40439bee661392b…

MALICIOUS

PDF

35.9 KB Created: 2020-07-10 15:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81a14e024e12f50201f463b4ba370974 SHA-1: d7bac9e6fdf69562059f6f85d4cf8ea7987f3735 SHA-256: f40439bee661392b2de0e0dc87c604ba5614bf12522fcbbeb44bbc11c27ee4dc
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, that redirect to various external URLs. One prominent URL is https://ttraff.com/wb?keyword=2014%20nissan%20versa%20maintenance%20manual, which appears to be a lure for search engine traffic. The presence of a large number of links to potentially unrelated PDF files suggests a tactic to inflate search engine rankings or distribute malicious content indirectly. No scripts were extracted from this sample.

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/wb?keyword=2014%20nissan%20versa%20maintenance%20manual
    • http://files.bargeattitanic.com/uploads/1/3/2/6/132682040/tuzamemizux.pdf
    • http://files.geoffalainllc.com/uploads/1/3/0/8/130814591/wilujekasig.pdf
    • http://files.425sqn.org/uploads/1/3/0/8/130814642/zotazaboma.pdf
    • http://files.skipstonepublishing.com/uploads/1/3/1/3/131380032/5723668.pdf
    • http://files.mthomesandland.com/uploads/1/3/1/4/131454255/kaxufetaxu.pdf
    • http://files.restauranthibiscus.com/uploads/1/3/0/7/130776841/5106130.pdf
    • http://files.unitedvisionaryarts.com/uploads/1/3/0/7/130738988/443ffd9a260.pdf
    • http://files.centrepointecincinnati.com/uploads/1/3/1/4/131406413/e08b8.pdf
    • https://sisakapajaw.files.wordpress.com/2020/06/47967008860.pdf
    • https://liropija.files.wordpress.com/2020/07/35506951254.pdf
    • https://sipuvomo.files.wordpress.com/2020/07/posisobokugavew.pdf
    • https://weberex.files.wordpress.com/2020/06/34930366763.pdf
    • https://xoxufasi.files.wordpress.com/2020/07/zidatu.pdf
    • https://sixidoda391439585.files.wordpress.com/2020/06/88584862588.pdf
    • https://zuxejububen.files.wordpress.com/2020/06/80395593976.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/18034928855.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90442425312.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87463685859.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wozofedotomutigetipire.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_off00005041.bin
acde42936a1b696b30c3a9e78db06a15c0096dc913c7e63d2b2ddbb734656399
pdf-font-stream PDF embedded font (sfnt) at offset 0x5041 5096 bytes
font_01_sfnt_off00006177.bin
8cac19869127a9b8d2521ea43c0c7141de17156899476a3c00409880f52f525b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 10080 bytes