Malicious PDF — malware analysis report

Static analysis result for SHA-256 24adb96c79143025…

MALICIOUS

PDF

34.6 KB Created: 2020-08-08 11:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23a42f48f00f54d6619cf3d6c5afe088 SHA-1: 30eb3ca1122e7874bc8af9c5c0bc3cb2d67f4601 SHA-256: 24adb96c7914302544de01de433cae77551162581c917bcef67a3a1b2cf39c04
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of outbound links, many hosted on Shopify, which is a common tactic for distributing malicious content or for SEO poisoning. The presence of a 'download button' lure further supports the malicious intent.

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.com/wb?keyword=inside%20haunted%20house%20worksheet
    • http://files.eisenhowerchoirs.com/uploads/1/3/1/0/131070792/21822ea73f65def.pdf
    • http://raruje.chriscruzboone.com/uploads/1/3/1/0/131070374/6774982.pdf
    • http://files.gailnathansonpaintings.com/uploads/1/3/1/1/131164081/gebuvazox.pdf
    • http://files.oquincegoldenretrievers.com/uploads/1/3/1/4/131453555/3063475.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6243/files/tudilosebaxagikuguxepulup.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/48901615704.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/vepisapokikilege.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/chiltons_manual_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0904/files/time_servers_ntp.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/6080225425.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/aadhar_card_name_change_form_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/rudumuvabiwegavobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1590/files/71049846607.pdf
    • https://cdn.shopify.com/s/files/1/0438/7821/9944/files/koroturomiwopenefatakir.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/hernia_hiatal_dieta.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/vodugatirevi.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_off00004c88.bin
563f41f117fa0bb3092756ee9fe871c7db41bd7bf0362a6c9b1ae3bbbad7d240
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C88 4972 bytes
font_01_sfnt_off00005d79.bin
4e2085721049835b1b5d059c75a3006d353eb0e08c17f376bf1def1bd4080dd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D79 9440 bytes