Malicious PDF — malware analysis report

Static analysis result for SHA-256 da475189ad3ebea9…

MALICIOUS

PDF

44.6 KB Created: 2020-07-31 07:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 883d057b43bb1c73734412eb7301a713 SHA-1: 646120abab9e8064c0df9009eb35d204745478e6 SHA-256: da475189ad3ebea95bd98b410e8094e47a5e3ffe0a5d38d5738480b462870870
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link at 'https://ttraff.cc/pify?keyword=attendance+sheet+excel+pdf' leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external links, likely for SEO manipulation or to host further malicious content. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the attack pattern of luring users to click malicious links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=attendance+sheet+excel+pdf
    • http://files.darylglinntanner.com/uploads/1/3/1/8/131856326/gokijimudipalu-wunen-rebepexukijoge.pdf
    • http://files.1stjacan.com/uploads/1/3/1/4/131452935/3587002.pdf
    • http://files.larryssportsexchange.com/uploads/1/3/0/8/130874128/folerezome.pdf
    • http://files.firstgenleaders.org/uploads/1/3/1/8/131856435/finumorakew.pdf
    • http://files.darylglinntanner.com/uploads/1/3/1/8/131856326/gokijimudipalu-wunen-reb
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/pisutaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/rekuwolikazatij.pdf
    • https://cdn.shopify.com/s/files/1/0430/2592/4249/files/49559685102.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/ganexirixobekirikame.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/34482282706.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/15378153343.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8849/files/fujilabulijogokelijagipi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/76425866019.pdf
    • https://cdn.shopify.com/s/files/1/0428/2309/0343/files/97585445445.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/3195960001.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_off000072af.bin
c97da1620da9f92810591807ca1265da1b611747c84ede66b483ea6d0aa2e0ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AF 4832 bytes
font_01_sfnt_off0000831c.bin
3bf963a75065d2fbd97e8a1825483697151b568d38b281264a227f12820324fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x831C 10052 bytes