Malicious PDF — malware analysis report

Static analysis result for SHA-256 84064812d4ffa450…

MALICIOUS

PDF

45.9 KB Created: 2020-08-17 15:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ff935ab1f005f2c0d43c6364a4414a1 SHA-1: 25885be8d7fa65f48471f13747555112150bcb8e SHA-256: 84064812d4ffa450d449d990f5a064f61bf1936eca1dc51cf72946087bbbc3ff
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a deceptive link disguised as a 'Kumon answer book' download. This link, https://ttraff.com/pify?keyword=kumon+answer+book+level+h+math+pdf, redirects to malicious infrastructure, indicating a phishing or malware distribution attempt. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. No scripts were extracted, but the PDF structure and embedded links strongly indicate a social engineering attack.

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/pify?keyword=kumon+answer+book+level+h+math+pdf
    • http://files.atheistsurvival.com/uploads/1/3/0/7/130739776/nefurex-zefafobakexezi-wadokut-pofadubifu.pdf
    • http://files.diasalinas.org/uploads/1/3/1/4/131438567/busadajuma.pdf
    • http://files.austindemaille.com/uploads/1/3/1/4/131453522/6794a3b.pdf
    • http://files.wardpearsongroup.com/uploads/1/3/2/6/132683080/b11b68.pdf
    • http://supufe.hollingertennis.net/uploads/1/3/0/7/130739192/9289771.pdf
    • https://geags.com/1il3ag
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/medical_experience_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/video_trn_web_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/assurance_wireless_application_virginia.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/60628819268.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6604/files/mosonitodiwowubamewe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3759/5560/files/19703162665.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/tinakavafititarigenifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.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_off000065b2.bin
007777be6a22793dc144a31fdbab7b0a13868929ef0ec3554b9b47b8d18abccb
pdf-font-stream PDF embedded font (sfnt) at offset 0x65B2 5440 bytes
font_01_sfnt_off00007812.bin
03d489d79161af9b45b815bd7770e236177788139848080e30f525252f21d2f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7812 10640 bytes
font_02_sfnt_off00009c8d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8D 4324 bytes