Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50d07e3ec611885…

MALICIOUS

PDF

46.3 KB Created: 2020-08-14 03:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f857d06b98a484d840162e288a600369 SHA-1: 0da40b4a10b4beb15a0e38226a1898ab719c53e1 SHA-256: b50d07e3ec61188529162587941bbe1d05bbbead329536b14584dee83bbe56cd
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The presence of a 'download button' heuristic further supports the lure mechanism. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=student+exploration+mineral+identification+worksheet+answers
    • http://files.inspiredbev.com/uploads/1/3/0/9/130969172/kevukoval-povavorirude-zutalulib-golisowad.pdf
    • http://xegotibul.deathnotenews.com/uploads/1/3/0/7/130776647/e01e792f16.pdf
    • http://files.pointpleasanttradingcompany.com/uploads/1/3/1/3/131398336/rizarojirupava_befelef.pdf
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/rokafevefogefevexezizugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/zoten.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/statistical_analysis_of_repeated_measures_data_using_sas_procedures.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/15292402133.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/48637331350.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/sogifumojifik.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/monoriwinatogir.pdf
    • https://cdn.shopify.com/s/files/1/0437/6077/9413/files/asme_drawing_standards.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/86698855680.pdf
    • https://cdn.shopify.com/s/files/1/0434/0698/3318/files/nebexumuzegepofevud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/35362843850.pdf
    • https://cdn.shopify.com/s/files/1/0433/7011/9318/files/xipitatugiverowaroga.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/gutuzaxufepotasiluwasota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006632.bin
5d2bada6659a06d5f927240eef05ac7be6cfad26314731737c65616d07c9e6e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6632 5604 bytes
font_01_sfnt_off0000791e.bin
2b6122d0290737a5a19f89f3a16bca43508afe19539cd2077b046002959c4877
pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 10672 bytes
font_02_sfnt_off00009db0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB0 4324 bytes