Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8d8953e2411999…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 14:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f246249c2a9c47178b89c19a4ce14d13 SHA-1: 56367b0100db3a6bf21f8fbf373d492f249d5076 SHA-256: bc8d8953e2411999744127dc86f657a10924f37cbfe5a50ceab533b746caaac3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector, indicating an attempt to drive traffic to malicious sites. The document body, though corrupted, contains text related to a 'dehumidifier buying guide' and the malicious URL, suggesting a lure to a potentially harmful site. The presence of multiple Shopify-hosted PDF links, while some are benign, suggests a broader SEO poisoning or link farm strategy to obscure the malicious redirector.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=dehumidifier+buying+guide+nz
    • http://sajobu.kristencarlsonwellness.com/uploads/1/3/1/3/131378816/siduvenebapesazeg.pdf
    • http://files.thomaschristopherhaag.com/uploads/1/3/2/3/132302924/971d4.pdf
    • http://renuf.thebarkingcatllc.com/uploads/1/3/1/3/131384611/tuzufu.pdf
    • http://files.skirtchasercharters.com/uploads/1/3/2/6/132682802/sulekusebokifebug.pdf
    • http://files.limousinesdallas.net/uploads/1/3/0/7/130739143/foritujavalidaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/aphrodisiaque_pharmacie.pdf
    • https://cdn.shopify.com/s/files/1/0437/9901/9682/files/financial_accounting_tools_for_business_decision_making_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9552/3485/files/tijal.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/isoclinic_and_isochromatic_fringe_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0435/1305/3338/files/vagijezogegejina.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/23748908774.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2733/files/53201836361.pdf
    • https://cdn.shopify.com/s/files/1/0428/6034/7551/files/3d_minecraft_games_online_free_without.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/chapati_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/mimuwenizesofososodivubag.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/9654177015.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/temazarikukilumeki.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_off000064dd.bin
c9f1d57c67541b847c4d88301b3fd48dab43808fc3536cf185ce03f7a7e081b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 5192 bytes
font_01_sfnt_off00007674.bin
347a412ee5dca40d4e7000047990c34ecb4d08298648758e3195b75b930b2459
pdf-font-stream PDF embedded font (sfnt) at offset 0x7674 10428 bytes