Malicious PDF — malware analysis report

Static analysis result for SHA-256 85efe9feba0cdb34…

MALICIOUS

PDF

45.1 KB Created: 2020-08-16 22:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c313816fb598bd9c20aa1d8a2f5c739 SHA-1: e68dfd3fe201ca6c31de5a5db81701d2b9e145e0 SHA-256: 85efe9feba0cdb34ce8a58fcb09f15b7f53dde5de93ad113e9f04fe0cf6180b0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary heuristic indicates a malicious redirector link to 'ttraff.com', suggesting an attempt to lead the user to a malicious site. The document body, though heavily corrupted, contains text that appears to be a document title, likely intended as a lure.

Heuristics 3

  • 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.
  • 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=teacher%2527+s+guide+grade+11+tamil+medium
    • http://files.1stfighterassociation.com/uploads/1/3/2/8/132814073/fokisudit-rutanaxewileka.pdf
    • http://files.joelsarver.com/uploads/1/3/0/7/130739043/nebimowime.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5900/files/4002033783.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/marudof.pdf
    • https://cdn.shopify.com/s/files/1/0435/5306/3063/files/getanuwikap.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/cephalosporin_generations.pdf
    • https://cdn.shopify.com/s/files/1/0433/9335/1843/files/minecraft_2._0_apk_aptoide.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/27553413537.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/xilubibelisavetekesuxotop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/mizorimalovubis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/10582491231.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/dovipulojapuzolitotimexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/normal_probability_distribution_examples.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/dowepejun.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_off0000509c.bin
ada54c7166a21e9c36d4973664489d9072ee753cc7251871f0a311a43a76ec2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x509C 5388 bytes
font_01_sfnt_off000062d1.bin
4b026ac227469e58fef570bc8d50e334747ad785666f550ee90ca091c551c60e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 15816 bytes
font_02_sfnt_off000085f7.bin
087de76c139a816e279be622437cc26b0554ffb4daefbc71a64d4fd87c725fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 9644 bytes

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