Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1e888b64ebeea8…

MALICIOUS

PDF

38.6 KB Created: 2020-08-15 05:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d051b188b0228a382a68b1f0e9b39fff SHA-1: 606e09cec38d2970aa8816f6c5e8372e7573248d SHA-256: be1e888b64ebeea8b3132009dddfd6963aff2457f3808a851f806fd0a2445da3
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=birthday+cake+making+video, is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to 'Birthday cake making video' and the malicious URL, suggesting a lure to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=birthday+cake+making+video
    • http://files.thealmaproject4kids.com/uploads/1/3/2/6/132681556/dujonenogowafamebir.pdf
    • http://files.petsandpalscic.com/uploads/1/3/1/4/131406592/1dabf6ff63d.pdf
    • https://cdn.shopify.com/s/files/1/0434/3414/7989/files/vivah_movie_openload.pdf
    • https://cdn.shopify.com/s/files/1/0433/3358/2998/files/25502613541.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/45133981074.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6083/files/31786430718.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6091/files/fuwope.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/9807914599.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4822/files/pokibuzosojepix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/jofatigasenoxu.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_off00005965.bin
a9c2bfe81e35ab5720f9af6b905c949b6e445edcb3c5d3800407e2a5d731971b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5965 5420 bytes
font_01_sfnt_off00006bbb.bin
c410dc92de8e0a4224eab1ffe6107777e6b62306031190674c696471bbab753a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBB 10072 bytes

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