Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb656ccf255747b4…

MALICIOUS

PDF

98.0 KB Created: 2020-08-08 09:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5868b9c3a7f739029039d1942dcca088 SHA-1: 25f92c6ebb03053dcaef88dfd7f2e789c68ec281 SHA-256: bb656ccf255747b4a4ac4c9c490ddf9e3708f43d7d5abecc7fc24f9f040de0c9
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.cc/pify?keyword=classroom+objects+coloring+pages+pdf', indicating a lure to a malicious URL. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests this PDF may be part of a multi-stage attack where the actual payload is password-protected.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=classroom+objects+coloring+pages+pdf
    • http://volajap.terraformidable.com/uploads/1/3/1/8/131856725/dezom.pdf
    • http://files.brucemakotoarnold.com/uploads/1/3/0/7/130740258/1659094.pdf
    • http://files.usaerospacedefensegroup.com/uploads/1/3/2/7/132740779/jefejuzo.pdf
    • http://moxilube.biesyiczadyfci.com/uploads/1/3/2/7/132710621/2420425.pdf
    • http://files.philadelphiapediatrics.org/uploads/1/3/0/9/130969079/0e8edac97f.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/vudaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/tawiwirejekezapakuxara.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/zubixigafewomojimezuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/9611/2294/files/vupasoxatimuxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/65498763708.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/dalopawedujoremurova.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/chicago_quick_traffic.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/duvevugamidalopi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/zemavazuzibik.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/9057588673.pdf
    • https://cdn.shopify.com/s/files/1/0437/9954/3970/files/31228341157.pdf
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/negative_character_traits.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/wurebodemedizeli.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1152/files/waxakakujakerotuketoxobu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001407b.bin
f8dc7fe72351b9bc907b43dd6a31d295ee7c72014164f490193ba7dc49a6506b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1407B 25272 bytes
font_00_sfnt_off0000fb95.bin
b8d9bbe608f42c334a7997c40fcbcfd08d6350f4c5274b8221447d0084fc980a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB95 5504 bytes
font_01_sfnt_off00010e30.bin
d32462d73e9e21db25335f07400828f7b32da4962696c79d333bfae732dc4ad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 16200 bytes
font_03_sfnt_off00016bdd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDD 4324 bytes

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