Malicious PDF — malware analysis report

Static analysis result for SHA-256 935754888aca40af…

MALICIOUS

PDF

48.9 KB Created: 2020-08-15 00:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11389a48ce2753adc7b7b1ad9740f00 SHA-1: fb210562bc6388de8ef5d8c9a741c5eecd455c96 SHA-256: 935754888aca40af3c6ef6c9233ec312981b603b5c3b6be269990e743ff35542
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=civ+6+mapuche+guide', which is flagged as malicious. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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.ru/pify?keyword=civ+6+mapuche+guide
    • http://files.happinezibiza.com/uploads/1/3/1/3/131381363/617648.pdf
    • http://files.milamk8.org/uploads/1/3/1/3/131380213/ade4b98ca367b76.pdf
    • http://files.helenbreil.com/uploads/1/3/2/7/132740193/wudas_mumiwibufetara.pdf
    • http://files.luzdevidahealingarts.org/uploads/1/3/2/7/132712266/3126190.pdf
    • http://tazis.oakhillsoregon.com/uploads/1/3/0/7/130740051/84bb118eb0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15843942414.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/callista_roy_adaptation_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/rutujevomuvawavofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/75030203577.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/lisodukefumadipugemiba.pdf
    • https://cdn.shopify.com/s/files/1/0435/4637/8404/files/kodaxufinerazakerarixuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29480145432.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/39443433131.pdf
    • https://cdn.shopify.com/s/files/1/0439/7305/0526/files/94236685103.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_off00006981.bin
dba8df99ce078661e4878e1fabb4f45ccb2b079f7622b703ca8fe842a83203ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 5004 bytes
font_01_sfnt_off00007a84.bin
5d8c88ad9f5eb89ebea6d734f056a5efa2ada78389dfedd5fa079cf06b5adb35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A84 15212 bytes
font_02_sfnt_off0000a92a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA92A 4324 bytes

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