Malicious PDF — malware analysis report

Static analysis result for SHA-256 35adff27fde29320…

MALICIOUS

PDF

40.3 KB Created: 2020-08-18 15:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e46a7447a8ae8a79a49ebd6b3faf545 SHA-1: 1f456893c6b9f1141d1bd494017ac19ea8b03244 SHA-256: 35adff27fde2932083bb349503b372d5de674bd7b67f40a7abcb6a8682ac52e2
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a download for a 'Cambridge English Pronunciation Dictionary APK'. The PDF also contains a mass external PDF link farm, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a visual download button further supports the lure-based attack pattern.

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=cambridge+english+pronunciation+dictionary+apk
    • http://files.oregonheritagehogs.com/uploads/1/3/1/0/131070212/tepofadipezosa.pdf
    • http://files.conniehardyreflexology.com/uploads/1/3/1/4/131453944/bokokolubeme_zidigeloja_xagozen.pdf
    • http://kelubi.mineandcozy.com/uploads/1/3/2/7/132710797/2040195.pdf
    • http://wugor.twinviewstables.com/uploads/1/3/1/6/131636948/vuzavim.pdf
    • http://files.oldfilibuster.com/uploads/1/3/0/7/130775432/ravokivexuzileb.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/62184970493.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/ahindra_ghosh.pdf
    • https://cdn.shopify.com/s/files/1/0433/9744/7836/files/pyramid_lake_ca_fishing.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/cbic_exam_secrets_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/donabitiruba.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/32675148104.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/ximotakovesubutim.pdf
    • https://cdn.shopify.com/s/files/1/0438/1920/4765/files/gapps_lollipop_cm12.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/nagupepikesuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4419/8805/files/65722779921.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_off00005c96.bin
180a4d378dde1de02bb331b40f93c41985d2175625730e76c0b5140fd4f49cf5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C96 5700 bytes
font_01_sfnt_off00006fcc.bin
5ff71e6b141e82cf3296c9226cd23feb54ac46d5a0697bc30c993a3b3f13c188
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCC 10712 bytes