Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e115365dc72adb…

MALICIOUS

PDF

50.9 KB Created: 2020-08-22 22:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a990c7b08125d4386edc1674d78a22 SHA-1: 006e56d40951e98ab58b01555414868ab72a4012 SHA-256: d1e115365dc72adb1411f4f0624d4a1cc7959ed0c200cd5f68bc944e022a35fc
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a 'new england colonies map worksheet'. The PDF also contains a heuristic for a link farm, with numerous external PDF links, many hosted on shopify.com. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=new+england+colonies+map+worksheet
    • http://files.timewithtyler.com/uploads/1/3/1/3/131384635/togisopobe.pdf
    • http://files.lehighlines.org/uploads/1/3/1/8/131856170/2541763.pdf
    • http://dolote.brockenhurst-station-taxis.com/uploads/1/3/1/8/131857120/lavabuguxut.pdf
    • https://cdn.shopify.com/s/files/1/0449/0684/0231/files/teziz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/87519954184.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7550/files/cpa_sample_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/4917/2643/files/4_qul_surah_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/kinutipi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/juzopuvi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1117/8649/files/heteroside_cardiotonique.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/lozalosirefirunam.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/faa_form_3330_42.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/50954434149.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_off00008937.bin
745c1462551174e7cf1ffac7fc7feaeaa2490d0e211eab7dcd753c1e25a5b335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8937 5612 bytes
font_01_sfnt_off00009c38.bin
88b24c82c7a0fe2051b527286ef22a5d8c2fdc74979ebe75e81889173c055d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C38 9960 bytes

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