Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b983366ff50aac…

MALICIOUS

PDF

68.7 KB Created: 2020-08-09 07:39:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 048f0efdceb12bde41149354d2f0f3c2 SHA-1: a7af46143d5f101822940d5e4fd6d873e346e917 SHA-256: 94b983366ff50aacd88e73f52eebda11aac854bf078c322c700ea643dbe626d5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=accords+tolt%25C3%25A8ques+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of multiple embedded URLs and a machine learning classifier flagging it as malicious further supports this assessment.

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=accords+tolt%25C3%25A8ques+pdf
    • http://fusoxoni.labrowncoaching.com/uploads/1/3/1/1/131163943/b74c23300669.pdf
    • http://files.miissb.com/uploads/1/3/0/7/130775528/zuxugesijomi-puxowujedamimi.pdf
    • http://files.greenhopefinearts.org/uploads/1/3/1/3/131379443/cacad7ec.pdf
    • http://files.mii
    • https://cdn.shopify.com/s/files/1/0437/8899/2674/files/19133839022.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/darril_gibson_security_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/juretefowelifaboko.pdf
    • https://cdn.shopify.com/s/files/1/0449/8666/3070/files/quantitative_aptitude_questions_with_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/tugozefomokeboxezinibase.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/chemical_principles_peter_atkins.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/84825584572.pdf
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/22226181911.pdf
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/jail_brake_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/zinilakotuduv.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/geketeganigimupazomamujof.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
font_00_sfnt_off0000b4fc.bin
4331dbc01d8dd04fa79010683574de74e9a5a3a776e68226b5fb0546791b5688		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FC 4924 bytes
font_01_sfnt_off0000c582.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC582 1800 bytes
font_02_sfnt_off0000ce10.bin
582f96c14cefd7d9ffb4ba568f138e1febed8f00d9fe1c89ff843d4e47cf3f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 12824 bytes
font_03_sfnt_off0000f5aa.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 4324 bytes

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